When it comes to dental work ... I consider it to be one of the biggest obstacles to good health.
So when you're thinking about the cost, please also consider the long-term costs of poor health, which are probably much higher.
i had all my Amalgam fillings replaced with composite. Also had my 2 teeth with crowns pulled (one of them was a root canal). I recommend Hal Huggins' books. These are big decisions. Having a tooth pulled is inexpensive but of course, it's not an easy thing to do.