The price would depend on where you live. Implants take a long time. I am getting one and we started in November. It is a long process because there is bone grafting and you have to make sure your body doesn't reject the implant, and that takes awhile. It can take up to a year.
You should check with your dental specialist right away as you have to make sure you have enough jaw bone for the implant to go into. If the teeth have been out for a long time you may not have enough jaw bone left especially if it is in the front. The sinuses are there and that can create another problem.
My advice to you is to see a specialist, google so you are well informed and don't necessarily take the lowest price as that is not always the best way to go. Check out the dentist. Get him/her to give you referrals. Good luck and let us know how it went.