Whatever you've got lying around. I cleared out my cupboards and sold some old Barbie dolls I had as a kid and the clothes that went with them.

Old clothes are good too, you might not get a lot for them if they're not a big brand, but I've sold some denim shorts for ￡10 before.

Anything except certain birds or animal protected by CITES-or products like Red Coral or Ivory.

Most things that are legal in your country, aren't age restricted or food etc. look at their guidelines online:-

www.imtoolazytocheckmyself.com :-)

Pretty much anything! Read their policy guides to see what's excluded.