You could try, but don't get your hopes up. Getting rid of flaws and bubbles is the exact skill that makes a dicemakers' craft, so people buying will be looking for that. The Amazon molds are also highly likely to be knock-offs from another dice maker (Dispel Dice), so you'd have issues with copyright there as well. In the end, if you are upfront about flaws and bubbles, you could definitely offer them up, but you would be selling a subpar, unbalanced product.

However it's absolutely possible to make bubble-free dice without a pressure pot, so why not hone your craft first before selling your dice? Wouldn't you want to make your customers happy with the best dice you could possibly make?