I kind of agree with Jim ^^^, but we do not know if it is a great value for the price, or the history, is it still being used, or been parked for many years? Can it be hooked up, to check for movement of pinbox, or frame? Is there a trailer specialty shop nearby? I have a great place less than 10 miles from my house, that could easily make this repair.
I would expect the repair price to be higher than the $600 that Jim was charged in 03, but could be less than 1K. If mostly labor, at say $120 an hour, likely one 8 hour day at most.
As with any RV, there are likely many things that will need attention. OP...how handy are you, to do smaller fixes/maintenance?
Jerry