[Mr. Dave]

I think the fact it's very very easy to get autographs from any members of The Hip it doesn't increase the value of an item, the value for me is in the rarity of the item itself and personally i would look at a rare item being devalued if signed. Something like your signed Hipeponymous or the Coke Machine Glow book and cd i wouldn't expect much more than the regular price of new in store merch.

Everything I have signed I value more than anyone else would but that's more in reliving the events that surrounded the signings.