I think the answer is yes, well some do for sure, depends I guess if you DJ/work with a one box rotation method where all your eggs so to speak are in one box and only have that as your source, buy,sell,swap,trade or if you have a base collection which you can call upon and rotate that way, I fall into the latter and tend to use of late the base collection to buy,sell,swap,trade....sometimes it's hard to part with stuff that you have had for twenty years, other records it's not so hard and so it goes on....lol
Regards - Mark Bicknell.