[toledo_mudhen]

You don't say "how" you sold the card?

In 30ish years of card deals (buy & sell) I have only used - In Person, eBay and Net 54. Have never had an issue with any of these (just dumb luck maybe?)

When selling other than in person - I have always used USPS with tracking (sometimes priority, sometimes sig required, and always insured on high dollar deals). To me $600 would fall under the category of "high dollar" deal - so it would be insured.

On Net 54 - have always used PP F&F - both buying & selling. Have always made sure that both sides get "tracking" updates.

Over the last many years Net 54 has become my "preferred" method of both Buying (even tho it includes me paying up front) and Selling (requires trust on the buyers part).

Lots of trust in USPS and lots of trust in Net54 BST.

eBay pretty much an irritating platform but not many alternatives that get the same number of eyes on your item. Been on eBay since 96 and never any issues there either.