I've been looking for a Cheetah for years. Prices vary greatly on this one. It's really all over the place. It's a classic Stern, it's a harder to find title, and the playfields almost always have a decent amount of wear.
$2500 minimum, up to $3500 IMO. Some owners with nice examples have asked over $5K. Some with beat up examples want the same high prices.
I'd compare Cheetah to Embyron prices. I think around $3000-$3500 is the sweet spot, depending on condition.
Pinside recently updated the estimated value as over $6000. I think that's absurd. It's a sought after classic Stern, but it's not on Quicksilver's level.
My two cents. When you go to sell, you won't have a problem getting rid of it though. And if that guy is offering you Cheetah for LOTR straight up, I'd say no fricking way.