If anyone is looking for old issues UNI Magazine (out-of-print but awesome!), check out unicycle.com in the UK. They’re blowing them out for £0.50 each (less than $1). Shipping to the US isn’t cheap, but it’s still cheaper than paying full price for each issue. I think I’m only short one or two issues now. 
http://www.unicycle.uk.com/books-videos-and-dvds/magazine.html