Patience pays. I have been looking for about 3 years for 126 SD to replace my 350k + miles '83 SD. I just bought a one owner 1982 300SD with 70,00 miles and in great condition. Everything works, all service records--even has a Mercedes battery. The spare rim has never been rotated to the car and thus, in showroom condition. The medical packet has never been opened. And she runs like a sewing machine.
All for $6500.
I'm in love again.
So if you're looking, keep the faith.
(The same week I found a '84 300SD in Oregon with 32,000 miles and in mint condition...for $12,000! It was so nice I would be afraid to drive it. So I went with the '82)