Welcome Mary Ann!! You will find a ton of information and help here. There are good deals out there but they get grabbed up quickly! My old trailer sold in under a week and was purchased by a couple who had been looking for awhile and we're ready to make a quick decision.
Price is also somewhat dependant on how handy you are and/or willing to do some renovation.
Fiberglass is remarkably resilient and even really old trailers can be brought back to life with some work.