As far as I can tell in the UK U.S. vintage drums bring at least 50 percent more than what they cost here, 1000.00 kit brings 1500.00 to 1700.00 and from what I have seen the rest of Europe is the same,maybe more in some cases.
The drums look Dayton era at the earliest from what I can see, reading what the int tags say should make it easy to determine the age and era within a couple of years,which make it pretty easy to determine a U.S. dollar value.