[Henk]

Hi,

Question is how fast do you want to move the lot?

If you want to sell it in one go you'll need to find someone with a lot of money! Imagine 3000 cars each selling for $20 would already cost $60,000 for the buyer, and then you still have all the track and parts. There are buyers out there who would be able to buy all at once, try to contact electric Dreams in the USA, if you're located there. Shipping would cost another fortune, probably you'll need a container. In the UK you could ask Pendle or Phil Smith.

If you would sell them individually it will take you years. Documenting and listing every car, or group of cars, is a pain in the a$$.
Besides, platforms like eBay now have a legal obligation to report you to taxes if your sales exceed a certain limit, here in the Netherlands it is currently 2000 euro. This means you could be bites by taxes.

Also not to forget that most buyers will be only interested in the rare pieces, sos you're stuck with the common pieces for years to come.
Maybe the best thing to do is go commercial, register as a shop and open an online web store. You can research for each car what it's worth by checking sites like eBay and then search the ended listings.

You have a real problem with that much items, either sell all for "little" money or be busy for years.