Joey,

Avid's policy on selling of ProTools and so forth is detailed, although somewhat cryptically, here: http://avid.force.com/pkb/articles/FAQ/en363631

It does not look like they encourage license transfers outside of the iLok environment.

I was going to purchase a used M-Audio interface earlier this year, and because of Avid's relative lack of general customer service/technical service, for used products, I steered away from it.

I think you will be able to find a buyer. One place to advertise is at the forums at www.kvraudio.com

-Scott