Underground Comix are known for using different prices, covers (art or color variations) and/or interior content to distinguish between printings.
1st print October 1973 has 0.50 USD cover price.
2nd print has 0.75 USD cover price.
3rd print has 1.00 cover price (may have a higher price sticker over price).
4th print has 1.25 cover price.
This issue has variants: