What scale are they gis?
I have too much to make a list of. Lots of different scales, ranging from 1:18 to 1:87 (tiny, I know, but I have an F40 from Herpa in that scale of which both the hood and the engine bay can be opened and it even has engine detail!)
Nowadays I stick to 1:43, which doesn't take a lot of space and has detailing to match larger scales. I used to go to this bourse which is held four times a year near Utrecht with my dad. I think it's the largest in Europe. It's huge. Lots of people from the UK, Belgium, Germany, France and even Italy go there to buy or trade models. You can find anything there and (can't hide the fact I'm dutch, lol) for good prices as well. Too bad I don't go there as often anymore. So if you guys are interested in models I can recommend it to you!
EDIT: The NAMAC bourses attract about 4000 visitors and have over a kilometre of table length.
http://www.namac.nl/pagina_beurzen_data.htm