i was lookin at the doujins and came across a quesSTION....!!! why are the first and third doujins $7.99 while the second one is $17.99??

second one is 70 pages and has 11 pages of full color

first and third are 44 and 24 (sorry i dont have a lot of control over the price) and the third one is better done and more compact etcccc