How cheap can you get
On occasion, I would try to start my 97 Explorer and it would just click. Knowing it was something that would never strand me, ((((((((you can just jumper the two big lugs of the solenoid, )))))) I put off the repair till it took about six turns of the key to start it. I've always had a curiosity for how things fail so I removed the solenoid and CAREFULLY drilled out the four base rivets. This is a plastic that cracks easily. Inside one lead of the coil is welded to the backplate and the other is soldered to a wire that goes to the small screw connection on top. I cut this top screw wire and removed the coil assembly. When the copper contacts were exposed, the were coated with this light powder blue coating. I've never seen a coating like this. It was almost iridescent. Scraped the contacts with a small chisel and sandpaper till they were bright. The copper contacts are heavy and showed almost no wear. Reassembled the solenoid, soldered the wire, and secured the backplate with four pop rivets. Maybe I saved $16. Just a lot of fun to see what you can fix.
Note: the two big luggs on the starter solenoid operate the plunger on the starter which pulls in the gear and operates the contacts that connect the battery to the starter. You can jumper these two any time. Key on of off and it will crank the engine. If it still doesn't work, there is a small wire that goes to a 1/4 inch spade connector. This gets corroded sometimes. Finally the heavy wire to the starter sometimes has a bad connection at the starter. loosen and re tighten. A lot of starters get replaced for no reason because connections are bad. Of course reolacing the starter fixes them!