No one wants K bikes, there are quite a few in that search.
There's an R1200C, but that bike is only popular to a niche market. Most people hate them because they are quite possibly the fugliest dumbest bikes BMW has ever made. I mean, the Bond movie that made it famous was the one with Remington Steele as Bond. That should tell you everything.
I'm a little surprised that the 2000 RT is that cheap. But it's also an ex-Highway Patrol bike. An ex-police bike is not something you should enter into lightly. And thus tend to be priced accordingly. I am aware that BMW R bikes tend to be built to last, and I'm not afraid to do most work on my bike myself. But I would still never buy an ex-police bike.
GS bikes maintain their value. But you can still get good deals on them. Especially 1100s & 1150s. 1200s seen to be more expensive.
I sorta had my eye on an R1150R. A lot of people don't really like the R/R models for some reason. So, they tend to be priced lower than you'd expect. Good deals to be had if you want the BMW R version of a naked.
Dunno much about the thumpers. That early F650 seems about average for what I've seen. I almost bought a friend's. I think his friend price was $1200, but he listed it on CL for $1800 expecting to be talked down. You won't find an F800 for that price unless it's got looots of problems.
I think, and actual BMW owners can probably correct me, that on the big R bikes, the clutch replacement is due around 80k to 100k miles. You basically have to fold the bike in half to do that. So, that's a big & expensive maintenance job. At the same time, from what I understand, it's recommended maintenance & the chances that your clutch will be fine without being replaced is pretty good. But still, you're supposed to do it around that mileage.
It's all about what people want. And most people want the GS. An R1150GS with high mileage but good maintenance records under $3k will probably sell very quickly. A shiny K bike for $2K can sit on CL forever.
When I was looking a few months ago, a ratty but cool looking R1150R for $2500 I almost got, but it got sold the day before I would have been able to check it out. Someone else had a super clean one that he had barely ridden in 5 years (needed new battery, fluids, everything, but had low miles) listed for incredibly cheap, I think it was $1500. It sold in a day. Someone else had either several (or many different ads for the same one) shiny shiny lovingly restored K bikes for $2k (I think). I had to skip past that ad for weeks. I wouldn't be surprised if it still hasn't sold & he's just taking a break.
