Heya David!! Justin here from GBB in Portland!! Welcome to us Jerry dudes' groovy, weird, techie online hideaway!
MattMan's post above is right on the money... there's also a subforum here on RUkind called "Garage Sale" where you may wanna post it as well, especially if finding a Dead-friendly home for the Mac is a priority. Considering the pedigree on the piece, I can't imagine you'll have much trouble finding an awesome home for it, no matter where you list it. =)