A while back I was able to acquire a signature of Tekken creator, Katsuhiro Harada, on my PSP 1000. My question is, how much is this PSP worth? The signature was written on the back of the PSP. Covering majority of the battery cover and a small bit on the UMD drive. The condition of the PSP is good, light wear, but very passable as a secondhand item. I just want sums. I have no intention of selling it. Thanks.