Who's building runescape style social trading (securely) for NFTs - would love to trade some free mints in particular https://i.imgur.com/ZA7iOMw.jpg

Senior prompt engineer. Shipped on farcaster: @larrybot, @qdau, @frames, @framesfun, /open-frames, farcasterchannels.com, farcaster.id, @mod, @search, @discove

The only OK solution I've found so far that supports more than just Mainnet and is free: https://www.swapx.com/
It uses 0x Protocol. Basically, it's just UI and DB for orders.
You can swap ERC20, 721, and 1155 in any combination.