look around for a $1000 trailer...CostCo/Sams typically have a $200-300 utility trailer that can haul decent size loads.
I wouldn't touch that truck honestly. At least not trade wise. The seller is a flipper. He has sold 3 vehicles on that site in the last year. So odds are he bought it dirt cheap and is looking to offload quickly at higher price.
You will not appreciate the size reduction either. I went from a CrewCab F-250 to the X. The CrewCab is waaaaay smaller. An Extended cab is even smaller