It would be cool to have a private sale or a swap option. Lets say I have a lot of NFT's I want to sell directly to one person. I get their wallet address and the sale is only for them. Or want to swap one NFT with another, I get the other parties address, select the NFTs I want and send the offer. I know there are services out there to do this but I really like how well gas fees are managed with your service.