WTF are you on about? They traded/sold a used Jeep, it's used. You have no idea what they disclosed or knew if anything was wrong. A dealer selling it is another issue.
Do you typically return a vehicle to "off the factory line" quality before selling it?
Keep an eye on the steering stabilizer. It'll mask death wobble for a few days until the stabilizer is shot out again.
30-32 on pavement for everyday use? does it effect gass millage? Sorry irrelavent question, forgot it's a Jeep.
Yes, Synergy steering box bracket, front adj. trackbar, rear adj. track bar, and front stabalizer shock. Really tweaked the alingment till it was perfect to the mechanics likened and it drives as good as it can for now with minimum to no wondering. No more constant correction and no death wobble for now.
How is it selfish? Why would I do a bunch of maintenance and expensive upgrades like swapping to the steel steering box on a vehicle I'm getting rid of? Am I supposed to top off the fuel and take the buyer out to dinner too? Maybe paint it their preferred color? If I was willing to do all the work to freshen up the steering and suspension I'd just keep it. If you're buying a 12-13 year old vehicle with 100k+ miles on it you should plan on a full maintenance and bolt check and budget for some parts in my opinion. If you don't want to deal with all that buy new or at least low mileage. The reason a higher mileage vehicle is worth so much less than a low mileage one is exactly this. It's implied that it's used and likely may need some work and it's reflected in the price.
Trading in a vehicle with a known death wobble is selfish, especially if you don't mention it.
You're trading it in to the dealer, but you're worried about who they sell it to for significantly more than they paid you for it? That's insane. Use some of that mark up to fix it. Private party sell I'll mention every issue I've ever noticed. Trade in where I'm taking less than market value that dealer is on their own.
