The price depends on several factors. The best thing to do is to get several quotes to compare and contrast. Of course, company reputation is important. Some of the job related issues you need to consider are:
1) Liner thickness.
2) Whether the walls need to be repaired due to rust etc.
3) If you want wall foam.
4) How much patching is needed on the bottom vermiculite.
5) Are new faceplates, main drain covers and eyeballs included?
6) What other services you want done at the same time. Such as, balancing the water chemistry etc.
Getting the job done now will give you some room to negotiate because most companies are slower now. Waiting until a month from now will probably cost more.