Pawned!

[vilakins]

The local pawn shop has 50s SF paperbacks for sale: Analog, Astounding, Amazing and others, all $5 each. I'd have bought the lot if there hadn't been about 30-40 of them. So my questions are:

1. Which have the best quality fiction? The covers, with green aliens and scantily-clad blondes are not much help.
   
   
2. Which are best to collect / invest in?
   
   
3. Should I just buy the lot?