What's a 1990 amg sedan worth in today's market ?

I come across some interesting 126 cars every so often (Gemballa Sec , gullwing sec , numerous Sec convertibles and amg sec over the past ten years) but I haven't been too keen on following the sedans or the recent crazy run up in values

I just came across a mint 1990 amg sedan ,black exterior , lowered , amg rims , amg stickers on air cleaner and valve covers on engine . Not a dohc . Don't have any other details about it or its history . It does have 240,000 miles ! Interior is also mint with the exception of aftermarket DVD radio and shifter wood needs replacement .

What's a good price to pay in the current market?