Live 10/20 Question

[Forbillz]

Okay, last Friday I was at the Hollywood Casino in Aurora, IL playing 10/20 at a juicy, juicy table. Weak, passive. Only one other guy was decent. One hand I want thoughts on.

Note: I've been here for about 4 hrs, am up 20BB and haven't seen one limp/re-raise line all night. In addition, NO one ever limp/folded after a raise. The other "decent" player was not involved in the hand in question.

I get 79hearts in SB. 4 limpers to the button who raises.

I fold my eventual straight flush (yes, by the turn, the 6-8-10h had hit). But I just want to ask this question.

It would have been $15 for me to stay. Considering I've not seen one limp-reraise, I could argue I owed $15 for a chance at $105 (the 4 limpers all re-calling, the raiser, and my SB). Is this 7:1 "expected odds" reason to call here?