I've had a C&R for about 10 years now, do a lot of shopping at online auctions as well as major auction houses. Major houses have never been a problem for me, small dealers with just a few sales are usually a problem. Now I pretty much avoid sellers with less than 100 feedbacks, unless it's a really interesting item. I used to always check (Accept C&R?) before a bid but it has gotten to be where almost all do & I usually just send an email copy after the sale.

I think online sellers are turning a corner on C&R's. Some of the major sellers, LS&B for example, sent a note after my last auction purchase from them. They said they would keep my license on file for my next purchase. That is a nice touch that says they value my business - not many that way now but its getting better!

With regard to out of state purchase/sale. If you cross state lines its in the federal jurisdiction. My belief is it has to be with the appropriate license.