It kind of depends on how bad is the therapist and what problem you have that requires therapy. Some sensitive or complex issues require the best of therapists.

The relationship between price and quality of therapy is not clear though it's more chaotic from one side than the other. In other words, if you pay 300 bucks, it doesn't tell you that you're getting a great educated therapist, while if you get a therapist for 20 bucks, it's very unlikely that this guy is a Harvard educated master therapist. So look for cheap but not insanely cheap!

If you want to go with the cheapest, that's fine but make sure they're registered, and find out their educational/training background, and see if they have dealt with your problem before. It's even better if someone you know (your medical doctor) has dealt with this person before. If you don't know anything else about them, try to go to a group type therapy where therapist works with other therapists especially if they have some sort of association with a local university or government agency.

Don't go to some random therapist who works on his own, whose name you find from some private website or blog, who got his degree from an online "university", and still believes in Freudian penis envy. :P

Good luck.