Nice car, 126 coupes have always been appreciated...I think that they were the most expensive model in the line-up when they were new. The seller on this one specializes in ultra-low mileage MB cars that collectors pay crazy $$ for. He sold a 1995 w124 e300 diesel for $152k!! Even BaT commenters were making jokes about money laundering on that one. A normal, good example goes for like $6k.
You can still buy a nice 126 coupe on BaT for $20k-ish, and a lot less if you are the pre-flip buyer:
https://bringatrailer.com/listing/1985-mercedes-benz-500sec-42/