check ebay for comic lots.. i got 11480 issues for 4000k it was worth every penny...
Wow, 4000k = $4,000,000. You must have had some awesome issues in there!!!
But yeah, buying in large lots is the way to go, especially if you're not sure exactly what you like. Many times, you can buy a large lot for the price of just one of the new variant issues that come out 8 times a month per book.