Here's the high end comparable:

[ame]http://www.ebay.com/itm/Vintage-K-Zildjian-Istanbul-22-034-Ride-Cymbal-2685g-MEDIUM-WEIGHT-/141307278930?pt=Vintgae_Drums_Percussion&hash=item20e691f652&nma=true&si=EE3Z02GsZlOrJBA45jKUSNWxzrA%253D&orig_cvip=true&rt=nc&_trksid=p2047675.l2557#ht_536wt_900[/ame]

Thanks Bill. I'm always troubled by these misidentified ones. I don't know whether the person who bought it was basing their price on the claim it is an Old Stamp:

or whether they knew better. Then there is the uncertainty of the terse comment "59-66" which got a Thank You (but no change to the main text). Did bidders go by the main text or the comment?

I usually code them as what I see it as (Intermediate) plus put "reputed IIIc" in one of the comment fields. The winner certainly has lots of other auctions they are bidding on, including some from other categories:

[img]http://black.net.nz/cym2014/bid-history-K-Int.jpg[/img]

so I can't tell if they are very sophisticated in Istanbul K cymbal buying, or their feedback score relates to Sesame Street memorabilia. Things were much easier before eBay started cloaking the id of bidders.

What would you do with this sort of misidentification problem in terms of data analysis?

....Haul....that`s a buckshot disk !!

"could anyone ballpark the value for me?"

Apologies for trying to bring more questions than answers.

I feel that in order to ballpark a value you need to take into account some features that impact on price and that includes knowing just what "comparable" means.

As usual around here, I still have no direct answer to my question about whether Old Stamps do have a higher expected value than Intermediate or New Stamps. So I don't know whether you or Drumaholic believe it or not. Do you believe there is a difference in pricing between the eras and it is worth taking it into account in ballparking values?

And I do feel that in order to ballpark a value you need to take condition (keyhole and spider cracks around the mounting hole) into account. But as usual nobody has commented on that either. So I don't know whether you or Drumaholic believe that condition has an influence on ballparking a value, and if so how much. Do you believe that one should take condition into account when ballparking a value? Worth taking into account?

And most of all, I don't know whether your beliefs are backed up by recorded data. Or do you always just check the completed sales and that's enough? I base my beliefs on analysis after recording thousands of sales, and I make the raw data freely available to anybody who questions my interpretation. And that is all part of improving best practice.

I feel like I haven't passed some "old K secret handshake test" and thus nobody is interested in sharing what they know and (as importantly) how they know it. Or have I annoyed you by blathering on too much about science and about trying to improve our practice by being evidence based in our discussions? Am I just in the wrong forum?

Yes you are. But since the right one doesn't yet exist, then this one will just have to do for now.