driver electric seat doesn't work. how expensive a repair could this be? worst case scenario without actually knowing yet what the problem is.

Start with checking fuse. Then let's go from there, the basics

A used Front Driver's seat, complete, all components including motor. track, used, good condition, $400...;fair" condition (probably meaning thrashed) $250...4 bolts and wire connector, easy DIY, color u/k

Check on eBay and scrap yards for a used seat in your color. --- I got a six way drivers seat, a passenger seat and the back bench seat in leather for under $250 on eBay. Shop around and you might find a deal.

Never did say if it was the fuse....I could not find just a motor anywhere, but didn't check eBay. That came from one of those nationwide junkyard searches, and I really wonder what it looks like when they say 'fair condition"

The other option that could work is to get another Ford seat. The motors that control the adjustments should be the same. If you can find the motors for sale, check the part numbers to see if they were the same.