True but even now class of heroes sell for at least $60 normally idk what was the regular price at release was though? And also that game was just made with the normal psp game case this one at least got the holographic cover and the print number printed on it
The amount of difference is pretty vast and almost comical.
Class of Heroes 2 cost $35 and you got a digital voucher. Despite the low cost of entry, Monkeypawgames actually had problems getting the 2,500 minimum they needed to make the program successful. They did ultimately pull it off, though there are only 3,000 or so copies of this game. This means there are roughly 5.2 times more copies of One Piece: Romance Dawn out in the wild.
Furthermore, a basic search of eBay shows that the game is STRUGGLING to sell for even $60, with several auctions looking for that much going unsold. The majority that did sell, sold for > $53, which after shipping fees ($3 - $4), Paypal fees and eBay fees... you're probably making very little profit, if any at all.
To make matters worse, Class of Heroes 2 is actually a good game. It holds a 77 on Metacritic (only 4 reviews though) and a number of people were happy. One Piece Romance Dawn is quite widely regarded as a piece of shit game. It holds a pathetic 42 average on Metacritic, which would be significantly lower if it didn't get a few average scores. Most of the sales for OP also seem to be by people who seem to think they're investing in something worthwhile like gold.
Odds are this game will go on to be worth nothing or a very small profit down the road.