I had a 2001 F150 SuperCrew XLT with a 5.4 and 130K miles. I tried selling it for 2,900 back in 2015. Not one bite. I traded it in and was able to get 2,500 for it.
There are loads of F150's out there. Check the TSB database. Mine ate COPs every 60k miles. There was an issue with the plugs not being able to be removed and a special Ford tool to get them out. There were other known issues, but few recalls, so each one was $$ at the dealer. One I remember was the AC condenser line would drip water into one of the plug wells.
Good luck with the search, really check out the TSB and F150 forums to see what the known issues were.