I'm not too big on autograph collecting but I have a few things.
Things that I bought already signed:
The Needle and the Damage Done 7" record, sleeve signed by Raine, Jeremy, Mike Turner, and Chris Eacrett.
Live 1995 CD, sleeve signed by Raine, Jeremy, Mike, and Duncan.
Raine's solo album
Things I got signed in person:
The "PPU Rocks" Gravity sampler CD, signed by Raine, Jeremy, Duncan, and Steve (got everyone but Raine to sign it in 2006, then caught Raine in 2010)
A Healthy in Paranoid Times era promo photo, signed in person by part of the band (got everything but Steve (I think) to sign it in 2006).

I'm thinking about asking them to sign
one more thing this year.
