Who knows what the numbers are on the bottom of the wooden Thomas Train engines?

The numbers represent when they were made, so if a recall occurred, people would know which ones were safe or not. They aren't really "collectable," but a lot of kids love them and some parents try to get EVERYONE for their kids. This is one reason why so many consignment shops and other vultures want them so cheap. I suggest using eBay to scope out prices, but keep in mind that the prices on there are only really valid if someone is actually paying the price for it. It's not worth anyting if no one is actually bidding on the item / no demand for product.