How much is a shirt signed by Hoobastank worth?

I'm kinda tight on money right now so I'm selling some things on e-bay. So I met the band Hoobastank at the Chilli Cookoff here a few years ago. They all signed my tank top and it's just been hanging around collecting dust. I have no use for it sooo how much would it go for on ebay? hanging around collecting dust. I have no use for it sooo how much would it go for on ebay?