I have a high regard for my 211, 2008 e350 even at 145,000 miles. If I needed one now I'd try to get it with under 100k miles, but honestly, in good shape, these cars are a delight to drive especially on the highway. I would consider giving up on her if the engine failed, but I will keep it going for almost everything else. What else drives so well that costs under $10k? Rusty or dirty or any observable leaks? Run don't walk away.
I recently got a 99 210 with 50k miles and in great shape. I had to put a few thousand in it; tires, brakes, a few bushings. But I have a great car for under $10k. I think the same would apply to a 211.
I will comment though that there isn't much help here on the forum with 211 issues. I suppose there will be with time.

__________________
DS
2010 CL550 - Heaven help me but it's beautiful
87 300D a labor of love
11 GLK 350 So far, so good
08 E350 4matic, Love it.
99 E320 too rusted, sold
87 260E Donated to Newgate School
www.Newgateschool.org - check it out.
12 Ford Escape, sold, forgotten
87 300D, sold, what a mistake
06 Passat 2.0T, PITA, sold

Las Vegas NV