How much is my 1988 ford f150 custom 4 by4 standard 5 speed worth

There is one listed here for $6990 with 127000 miles, and another for $2950 no mileage shown. KBB does not go back to 1988, so that's my only reference point. $7k seems a bit high for an '88, unless it in REALLY good shape and the $3k one probably no so much. So Somewhere in between, you don't say mileage so can't guess any better

Condition and mileage is key. We need more information.

I have been offered $5k cash for my 1976 F250 and declined, as much as I could use the cash, I bought it new and we have been through a LOT together. 3 wives and good times. But I will sell my current wife for $5.

Probably not as much as you wish it was.

Completely dependant on condition. I don't think I'd pay over 5000 for the nicest one. A beat up one would be around 1000-1500