Then I highly recommend Ray Catena MB in either Edison or Union, NJ. Well within 500 miles, great prices and great service.I'm in VA. Would go about 500 miles to get a better deal.
When I bought my corvette, those forums make it pretty clear who the high volume dealers are and I bought mine from Kerbeck, widely known as a high volume vette dealer and one who provides some of the best prices in the country. Of course those forums have rules about discussing pricing, but the high volume dealers are all sponsors so the are easy to identify.
With that said, a MB is no chevy, and I do understand that. No reason to pay sticker price locally if I can drive a few hundred miles and save a grand.