No offense, but what hypothetical car are you buying for $5K that will last another 100K miles?
You can get used Nissan Leaf's in the price-range you're wanting. In Spokane tho I guess...
https://www.cars.com/for-sale/searchresults.action/?dealerTy...
Or used Prius's in Missoula:
https://www.missoulanissan.com/VehicleSearchResults?search=p...
edit: I am genuinely curious about the $5K car good for 100K miles.