However weird this sounds..
I'd start my own nationwide taxi company, made of Mercedes W123 chassis diesels. I'd buy as many 400 dollar cheapo ebay ones, fix them all up, and start a taxi company based in Boston. I'd undercut all the other smaller taxi companies, and people would probably think the 240D's and 300D's have a bit more prestige than the Chrysler K Car taxis that exist around my town.

Also, I'd have one of every Mercedes W123 model ever produced, fully restored. My daily driver would be a 1983 240TD station wagon, with a 4 speed manual.