There are really none to be found (Full runs). #1 & #2 are nearly impossible to find. The only copies of those sare reprints (edition of 27) that Marvin did. Figure that there were at least 110 actual isues (145 numbers, but some were double issues), and figure between $10 and $75 each. If you could find them at even $10 a piece, you are looking at $1100 for a run, although in reality a full run would probably set you back $3k - $5k.
I have a complete set and it is one of those things that took me years to get and something that I would never part with.