Heya, I can't play any instruments. I am a humble hardware engineer and IT. Lets get this to a good home.
I was thinking $80 plus shipping.
Sax has normal wear, but functions perfectly. Mouthpiece does have some...marks from use though. 
I have used this with mGB and an arduinoBoy and you can too, but like I said I don't have the skill, I was just goofing around.
Stock photo until I get back from work: