"Value" is decided upon by the individuals doing the deals. There is no real market price for vintage drums. The market is two guys in a bidding war one day and fifty guys the next day so there really is no way to quantify such an inconsistent demand...Okay....according to eBay pricing, the average price that a vintage SC shell pack in a "common" color goes for is, let's say...$1K (just to keep the math easy). That could mean that the trend is that all vintage SC's sell for $1K....OR....it could also mean that one SC sells for $500 and another one sells for $1500. So, my point is: "How do you determine "over/under" valuation? A Super Classic in gold sparkle is one thing. A Super Classic in Citrus Mod is quite another thing to a collector. Sound-wise, they are the same.
Well you ask a statistician and he will tell you to collect data and analyze it. Which is what I've done in my study of Paiste 602/Sound Creations since 2006. I capture all the completed sales on eBay and others as I hear about them. 1850 sales and counting... raw data free on request.
I fit statistical models which take condition and rareness into account, and I use robust estimators (trimmed means or medians) so they are not over-influenced by extreme values. This gives you expected values (or better: expected ranges) which do answer questions about "expected value".
Now you make arguments about eBay no longer being a useful place to collect data for vintage drums. Of course in order to evaluate your argument (being a statistician :D) I'd like to see your data on this. Have you been collecting data over the years and can you demonstrate that the proportion of "duds" on eBay has changed compared to the whole market? I know that eBay isn't a representative sample of the whole market but I haven't had data to quantify the sampling bias effect. Do you? I'd love to improve our collective understanding of this phenomenon.
Here's a good one: Can anyone tell me what the current value of a vintage Ludwig Jazzette kit is? Well, on eBay, there was just one sold to an overseas buyer for around $1800. Does that seem like a good deal? Okay, well there's a website that had a nice Jazzette listed for $3500 and it sold right away. Good deal? Okay, there is an overseas buyer who has a standing offer to me for $9K for my '69 Jazzette. Ridiculous! you say? Maybe. I still have the kit. So, I ask again (rhetorically)...Can anyone tell me the current value? I see three different current prices. Which one is "right"? Answer: The one you're willing to pay. :Santa:
Well, they are all "right" and they are data points not the answer to the "expected value" question. And anybody who gives a simple point value rather than a range (which is evidence based not off the top of your head) isn't doing the job properly. Best practice for many decades calls for somebody to report an "expected value" with a disclosure of uncertainty attached (a range of variation, or whatever).
Since you asked me what price to expect, I'd give the usual statistician cautions (you get what you get on the day, prices are highly variable, eBay isn't a full reflection of the market, etc) and the data:
Jazzette 12/14/18 recover silver sparkle repercussions has new L arm $1,499.00 14 bids eBay 6-Dec-05
burgandy jazzette w/bongos hack on bass requiring restoration 66-67 offset rail + cymbal mount $1,500.00 12 eBay 12-Dec-05
jazzette green rewrap and 400 brass shell May 21, 1971 all b/o no serial $1,800.00 BIN eBay 12-Dec-05
14 floor tom rewrap (jazzette) $226.50 21 eBay 22-Feb-06
12 rack tom rewrap mount changed (jazzette) $48.00 9 eBay 22-Feb-06
12 rack tom rewrap mount changed (jazzette) $47.00 11 eBay 22-Feb-06
12x18 rewrap mount changed (jazzette) $204.50 17 eBay 22-Feb-06
jazzette 12/14/20 later series bo 1802017 walnut cortex $700.00 BIN eBay 4-Mar-06
green rewrap jazzette now sans snare b/o $1,225.00 9 RNM eBay 17-Mar-06
green rewrap jazzette now sans snare b/o again $1,500.00 1 RNM eBay 1-Apr-06
Mahogany Jazzette on cymbalholics 3 holes on kick $1,450.00 cym 30-Nov-06
"Jazzette red sparkle w/jazz fest wrong tom mount modern 14"" $2,560.00 offered online 23-Dec-06
Jazzette purple re-wrap 12/14/14x18 wrong tom mount $3,059.00 31 eBay 1-Jan-07
mod orange ludwig modern jazzette w/wood snare new inner plies $1,199.00 BIN eBay 11-Jan-07
jazzette 1736385/1736475/1736462 6 ply $1,199.00 1 eBay 28-Jan-07
Jazzette 12/14/18 silver sparkle rewrap and reworked w/13 tom $1,075.00 RNM 22 eBay 28-Jan-07
Jazzette 1968 Jan 13, 1968 rewrap black over silver sparkle $1,668.72 16 eBay 18-Mar-07 uk>??
Jazzette 12/14/14x18 pastolui pulled at 1009 8 bids pulled 8 eBay 9-May-07
Ludwig 12x18 jazzette bass goes with kit above champ spark center mount (factory) some holes plugged $399.00 1 eBay 14-Oct-07
Jazzette 12/13/14/12x18 silver rewrap 63/64 assembled? Share rail $1,750.00 21 eBay 25-Nov-07 us>france
Ludwig Jazzette 12x18 WMP kick like mine b/o 1743804 $710.00 16 eBay 9-Dec-07 >maley59
Ludwig Jazzette WMP b/o 6 ply shells $1,500.00 online 16-Dec-07
"Ludwig Jazzette Blue Oyster added 13"" 16"" toms 14"" camco? Clear interiors" $1,280.88 7 eBay 9-Mar-08
Ludwig 12x18 jazzette bass red spakle pre serial $375.00 24 eBay 1-Apr-08 thai>usa
Ludwig Jazzette Gold Sparkle fairly rough extra holes $1,400.00 1 eBay 26-Apr-08
Ludwig Jazzette rewrap champ sparkle b/o 109**** 3 plys $2,000.00 1 eBay 10-May-08 >japan
Ludwig jazzette blue sparkle tom mount changed to pole 1965 $1,225.00 31 eBay 30-May-08
Jazzette 1969 maple finish $3,600.00 -1 eBay 8-Jul-08 poppy76 bought it
Jazzette 12/14/14x18/14 pieced together wrong tom mount $1,025.00 22 eBay 26-Jul-08
Jazzette 12/14/12x18/14 1056741,1056743,14=1559039 3 ply wmp $1,400.00 -1 eBay 30-Oct-08
Ludwig Jazzette 1969 maple $3,151.99 15 eBay 30-Nov-08
Jazzette 12/18 missing 14 $521.00 6 eBay 9-Mar-09
Jazzette 12/14/18 rewrap and Ludwig tom post $700.00 BIN eBay 10-Mar-09
Jazzette ks gold sparkle changed FT mounts and legs w/originals $1,600.00 CL-NY 22-Mar-09
Jazzette 12/14/12x18 rewrap SS early ks 1969 rail (ex repurcussions?) $2,000.00 -1 eBay 25-Nov-09
Jazzette early 70s BO clear interior damaged shells WMP $743.00 17 eBay 12-Jan-10 ship $75
jazzette w/matching 3x13 austria blue sparkle + extra 12 nice ks $3,764.88 1 eBay 6-Mar-10 eur2800
Jazzette 12/14/18 mahogany 1968 nice $2,900.00 22 eBay 18-Jan-11 world ship
Jazzette Bass OPB w/pole $977.00 27 eBay 20-Feb-11 world ship
Ludwig Jazzette sky blue pearl w/cym arm 1971 ks668530 1969? $3,995.00 online classicvintagedrums
Jazzette Bass chanpagne sparkle w/pole converted from consolette 1964 ks115166 $400.00 1 eBay 24-Feb-11
Jazzette 12/14/12x18 1977 BDP something fishy with tom badges missing b/o1359874 $1,615.00 12 eBay 10-Feb-11
Jazzette 12/14/18 and 4x14? snare Mahogany finish (decaying) and snare finish distinctly lighter (and fishy? plus I see 3x13) $1,899.00 BIN eBay 30-Mar-11
And leave you to it. If I wanted to devote more time to it I could fit some robust statistical models, but the data should do.
Sorry about the non-tabular formatting but vBulletin doesn't support html tables. Also when I started on this project I wasn't recording as much detail as I do now. I can post the definitions of all the fields and codes as required, and of course the original spreadsheet is available free on request. Oh, and not absolutely every entry I record is a sale. Occasionally I record something as a placeholder and put 0 bids -- for example the classicvintagedrums online offer at $3995 isn't yet a sale (last I looked).
And to that most recent sale of a Jazzette (shown below). I was suprised that it lasted so long with a BIN of $1899. Because it went for a BIN (possibly low but we can discuss that separately) it doesn't contribute as much to an understanding of price expectation because it simply offers a lower bound. "Somebody thought it was worth greater than or equal to $1899" rather than "somebody thought it was worth $1899".
I think the snare (certainly highly desirable if a 4x14) looks more 3x13 than as advertised a 4x14. A 3x13 jazz combo is still desirable...but I worry about that part of the finish I see. Refinished or original? I'd value other opinions. My old eyes and lack of experience keep me from seeing everything you guys do. Still, I'm not surprised that this went for $1899.
With my Paiste study (where my analysis is really focused) I've seen prices for 3 seemingly identical cymbals go for $95 on day, $127 the next and a rogue one for $250. I'd see this as similar to your pondering how to deal with lots of price variability. Am I worried by that? No, of course not. Statisticians have been dealing with this sort of variability for many decades. Collect data, analyze, publish results and raw data so others can spot room for improvement, update, repeat. The virtuous cycle of science. Yes Sir
As to Istanbul made K Zildjians. I don't collect or analyze any price data on them because I treat that as Drumaholic's exclusive province.