You can try Craigslist. Be forewarned - you buy a car for under $600, you'll probably be spending significantly more to repair the deficiencies.
There's actually a whole site dedicated to homes that are "for sale by owner". Here it is: http://www.fsbo.com/
Under communism, you would find the least private ownership.
Subguns.com is one place.
I'm looking for a private owner. Looking for a two bedroom in Norfolk
One can find information on selling property in many different places. Some places where one can find information are Adviceguide, wikiHow and For Sale By Owner.
If they are private they would not be selling seats. You would have to find the private owners and ask but any jet even small selling seats routinely is not private.
Local news papers, Craigslist, Autotrader,
You can find them here: http://www.vrbo.com/vacation-rentals/caribbean/belize
You can either buy this used model vehicle from a owner in the city or call/meet with various dealers to see if they have one. It's also common find private sellers online in your city who are selling and also willing to bargain.
No, I used to work for a DMV and they can not give out private info.
When the domain owner chooses to use a private registration it usually requires a court order to obtain the information from the registrar.
You can find a Garmin GPS system for under $250. There are many people selling used GPS systems for under $250.