You've come across a fine haul there. Body Slam is one of the most sought after Inty games, as is Super Pro Decathlon. The other three, while not as highly rare as Body Slam and Decathlon, are still highly desireable. For a while Body Slam was hitting the mid to high $100 range, not sure if it's still up there.

Body Slam I'd say $120, Decathlon I'd say $80-100, the other three in the $30-40 range. I'm by no means the final word on any of this. 8*) Intellivision prices have skyrockted in the past several years, so what I used to think games were worth has radically fluxuated. 8*)