The most expensive book I picked up last weekend UNCANNY X-MEN #136 published August 1980. The copy I bought is actually nicer than the one shown below. For CGC grading purposes the one I picked up is around a 9.0 perhaps even better, although that's only a guess. The vender was asking $35.00 which in itself was a pretty good deal given the condition. However, I was still was able to swing a bit of a deal on top...
Published: August 10, 1980
Penciller: John Byrne
Penciller: John Byrne
Inker:Terry Austin
Cover Artist: John Byrne
Cover Artist: John Byrne
Writer: John Byrne & Chris Claremont