Here are a few. Not saying I would actually want to own any of these vehicles, but they are three good examples of vehicles from major makes that were discontinued after a small production run.
Lincoln Blackwood
The Blackwood was killed only 3-6 months into production, so there are only about 3500 out there. They run cheap on AutoTrader, unless you can find one of the sought-after "Neimann Marcus Edition" models, of which only 50 were made for exclusive sale through their catalog.)
Suzuki X-90
Only 7205 imported to the US - came standard with - count 'em - 95 horses of four cylinder power!!!
Buick Reatta
Only about 7000 of these made (wicked cool digital display for back in the day)