If you create a thread you can list them as so!!!
Ex:
Hi, these items are for sale! If you want one, comment and we can negotiate!
-apple
-pear x2
-banana x5
On your profile, you can either list them in your signature (which would probably increase the likelihood of people seeing them), or on the biograpthy section of your profile. Like carlzisrad said, though, you could always just create a thread, rather than put 'em on your actual profile.