Here's a few shots of the snare bed on my BB for reference (from L to R).
The first shot is of the batter side - no light leaks through 360° rotation
Next is the snare side looking at the throwoff - light visible through the snare bed "crimp"
Rotated 90° (between throw-off and butt)- no light leaks
Rotated 90° looking at the butt- light visible through the snare bed "crimp"
Rotated 90° (between butt and throw-off)- no light leaks
Well if it's a 1977-79 model I believe that is the going price. At least that is what I have seen since I started investigating a month ago. They are not only very collectible but I have heard many drummers say the 70's BB sound different and much prefer them to the new ones. At the end of the day it's a matter of personal taste.
They can be collectable and you will pay the price for the "mystic," but it is just that in my opinion. At the $1,000 price point you can get some really good snare drums... and in my mind if I'm going to shell out $1,000 I might as well see what else is available in the price range. Truthfully your audience could care less about the choice made in snares let alone whether or not the BB is vintage or contemporary... heck only a certain slice of drummers care about that!
Maybe because I already have one that I really don't care about the hype for such a readily available drum and just see it more as a tool? I have to admit though that I did buy a 100th Anniversary engraved BB solely for aesthetic reasons. I was in the market for a vintage engraved BB from the 70's-80's era but at the price they were asking for them the substitutes became way too attractive. For me I would pass on a vintage model in favor of an unmolested drum for a lower price any day of the week.