We bought a rig about 4 years ago now, i wanted something that was true 4x4, that could be a 'winter beater' or take the family+ dog + stuff to the beach a few hours away, that i didn't need to worry about dings or dents, but that looked good / clean / fully functional when we bought it.
We ended up getting an '04 Explorer . it had 140K miles on it. 2 owners from new, private party thru craigslist, came with a folder full of receipts, they had had the transmission rebuilt @ 125K. The body is straight, paint nice, the interior is clean. We only pay for liability/ uninsured motorists insurance, no comp or collision.
Other than a few oil changes done in my driveway, it needed a "coil pack" after about 2 years, and i put on a 'crank trigger sensor' at the same time. { It could have been either part causing the issue } . Took about 1/2 hour of Youtube search/ video watching to figure out the likely culprit and how to replace them. 1/2 hour getting the parts from local autoparts store including the drive. and < 1/2 hour to remove the old parts and reinstall the new. Total cost $120 parts.
We've put almost 20K miles on it in 4 years. I did put a set of top rated TireRack Perelli Scorpion mud/wet + snow tires on it for about $700. Purchase price of rig was $3600. About 22 cents a mile so far [excluding gas and insurance ] and it should go another 20,000 miles with no major issues, bringing the total cost per mile down more over time. So many Explorers were made parts are easy to come by. Major Repair costs are similar to the Nissans and Toyotas [ and both of those are decent alternatives ] . We get about 16-17 combined mpg, it is hilly where we are. Had we gotten the smaller ford Escape instead i think it would be closer to 20mpg.
Anyhow, it's great in snow, will go down forest service and badly maintained private dirt roads that our Subaru Forrester would probably get stuck on/in , due to the real "low-range' transfer case + factory skid plates versus AWD....plus it's a more comfortable long distance driver than the subaru [which has similar miles and we bought new].
edit to add - you mentioned state surplus or auction house vehicles as potential alternatives to save $$. My 2 cents is lots of car auctions are "dealer only' so you need to know someone in the business [ although we have a local auction house out here that auctions 50+ cars, once a month to the general public ] . The Downside is the auction vehicles Rarely come with Any sort of history or documentation, and you can't take them on the freeway for a test drive ! I'd rather sort thru craigslist adds for a week or two, to find an honest / realisticly priced seller who can prove some long term upkeep/ ownership history....