Additional Note.... if you like the w124 OM606 with the 4spd, you will LOVE the w210 with the OM606 and the 5 speed.... It's butter smooth. If you don't care about the speed then then a well maintained NA OM606 will do the trick.
There was recently a nice '97 E300 on eBay well loaded that went for $10,500 or so. Leather, heated seats, etc...
Best is to have one of each though