The U2 T-shirt celebrating Amnesty International's 30th anniversary is now only $10! I picked one up at the Hard Rock Hotel in San Diego, and it's a very nice design and quality (made by EDUN).
FYI, it's a fitted style and the label says some shrinkage will occur, so you might wanna order a size up. (I'm 5'10", 160lbs., usually wear a medium, and got a Large after trying it on.)
https://rockshop.hardrock.com/Sale/Mens/product/HRO_YM_U2_Sig_Series_30_T_Navy/
Cheers!