I had a friend once who used as his motto, “No promises made, no promises broken.” That may be the only way one could honestly answer “no” to this question.
The bargains I have more trouble holding up are the open-ended ones. Sometimes I will get clear direction to give up or modify a behavior, without it being tied to any specific bargain on my part. Not knowing the higher purpose of what’s being asked is tricky, but that’s what I generally have to deal with when I don’t initiate the bargain myself. That’s one of the reasons I never felt particularly led to give anything up for Lent when I was Catholic; the church at that time did a really bad job of explaining why I sh9uld, no one in my family modeled the behavior, and I was never motivated enough to find out why the priests thought it was useful.
When it’s my idea, though, I know what I’m offering, and I know what I’m asking for. A little concrete thought goes a long way for a practical guy like me. So I make bargains with Ares to avoid conflict, or to gird myself if it’s inevitable, and I deal with Hermes to protect myself and my home from thieves. I have a clear goal in mind, and a clear idea of what I want to offer in return — which is subject to negotiation, of course.
Folks who are more sensitive to their gods’ words likely have more productive conversations, and doubtless find bargains initiated by those deities to be less trying. I don’t hear my gods well, so I make do with what I have.