No, but I have thought about it since fleaBay has descended into an abysmal search challenged experience.
I have used GC many times, not recently though, with no problems. They have a flat 10% buyers fee and reasonable shipping. They don't have the same overall selection as Heritage but a good selection of moderns and other issues. TC
I've used them. trustworthy outfit, no problems. like any other auction a lot of items bring the "full" price but deals can be had if you keep at it. shipping is fair and fast.
I've bought a few items over the past 1/2 year from GC; most of them amazing steals that were worth much more than its hammer price + BP. Pictures are better than Heritage AND Teletrade by far. Only downside is their selection; which seems to fluxuate based on the consignments that week. They ship extremely fast as well; something i can't say about Teletrade. I highly recommend GC!
Thank you for bring it up. I did wondering if there are auction that specialized in graded coins. That website is same as comiclink.com. It specialized in graded comic books. Yes, it's listed premium price, but we know it's not restored or altered.