>>46810822>$20For someone's sticker slapped over an energy card? None. I think $5-10 is fair for most of them. You can get $20 for those metal cards, but you won't get that for a proxy without tricking your buyers.
What sets good customs apart, though, is original art and ideas. I think pic related is a good example of that. New art, new card layout that only tweaks existing design choices, not such a cheap looking holo effect. There's a million pallette-swapped starters and armored mewtwos out there, you can do better than that.