This issue is a variant of Rip Off Comix (Rip Off Press, 1977 series) #1. There exist further variants.
Underground Comix are known for using different prices, covers (art or color variations) and/or interior content to distinguish between printings.
1st print has 0.75 USD cover price.
2nd print has 1.00 USD cover price.
3rd print has 1.25 USD cover price.
Inside front cover sequence with indicia information at bottom of page.
Inside back cover sequence.