Good post, but i think most getbiggers would turn down 15M$ for a movie if they didn't like the script.

hahahaha very true, I would'nt either hahaha.
Stallone knew that Judge dredd was going to flop when he read that script they offered him $20M to be attached to the movie, he just took it, he said the $20M was worth all the critics hammering him when the movie opened.
Over the Top, according to Keith, Stallone wanted all the cash upfront, i think $12M, which i assume bankrupted the producer (keith chime in if im wrong)
Cobra is a dumb movie, but the studio says "sly, want to do a real violent movie with no decent plot" will pay you $20M..
not to sure about arnies career, i knw he got a huge payday for T3, which sucked for the studio cause it sucked.