of prices on the types of services they have for you to choose from. call around and ask about getting a consultation, and if that costs money that you don’t want to spend you can ask what their prices are like for a typical fix like replacing a couple of tiles.
you can then put together a list of what people are charging in your area, so when you collect 3 or more you can average out what the prices are. one thing to watch out for besides prices that are too high are those that are very low because that may mean they cut corners or don’t have good experience 