There are lots different scams to pull, and you can't know which ones they'll be pulling until you get further into it. Suppose you say "sure I'll sell, how much will you pay?" "Oh lots of money, I represent Nigerian princes of limitless wealth, but first you must convert your artworks to NFTs." "Sure thing, how?" "I am expert in this process, you just need to pay me the gas fees required to mint the NFTs". From here they can go a few ways. They could just quote a standard market rate in gweis, and you'll be like "in what?", and they'll explain that a gwei is a billionth of an Ether, a trivial amount, and you'll google all that and determine "oh yeah, of course people pay gas fees to mint NFTs in gweis", so you ask "ok, how do I send you gweis?" They could send you to a scam site that will try to drain whatever source of money you tried to buy gweis with, or they could tell you legitimately, then you send them your gweis, and they could just fuck off with your money and celebrate a scam well done. But if they have your gas fees, they could keep it going by explaining the prince is eager to buy the NFTs, now you just need to create an account on the NFT marketplace he uses, which you'll google and realize "well of course I need to gwei up for a marketplace account", so maybe you send more gweis to the scammer to create the account, or the scammer sends you to a third party site from which they get a referral commission, but ideally the scammer sends you to a sham NFT marketplace that they run and keep the proceeds from. Then they could fuck off with even more of your money and celebrate a scam well done. But since you're in this deep, they're going to milk it, and explain how the prince has transferred a trillion gweis to the marketplace to buy your NFTs, all you need to do is list them on the marketplace. I'm guessing you can see where this is headed...listing them on the marketplace requires a listing fee! Google confirms all this is perfectly normal. You're hesitant, but the prince is a busy man, and in a hurry to close the transaction. This is not just a one time deal, he's an ongoing benefactor to a select group of Instagram AI artists who are now fabulously wealthy...but he can't be inconvenienced with delays like this! He's being driven to one of his jets, and if you don't list the NFTs by takeoff time, the deal will be scuttled!!