Underground Comix are known for using different prices, covers (art or color variations) and/or interior content to distinguish between printings.
The Print Mint-
1st print- 0.50 USD cover; 2nd print- 0.75 USD; 3rd print- 1.00
Last Gasp-
4th print- 2.50; 5th print- 2.95
This issue has variants: