I'm thinking of selling something my friend made for me. Is that mean?
If your friend made it for you, why would you sell it?
Some of it is poor quality.
That isn't a very nice thing for you to do. You should cherish the things your friends make for you. If you don't like it you should just put it away instead of trying to sell it.
It sucks. Don't worry about it.
Isn't it that thought that matters, though? Your friend will be upset if they find out.