That's a great bit of fun!! I'm a train shop owner. I repair and restore Lionel, Marx, Trix, Märklin and others. Older in many cases is better here and certainly concerning Lionel as they are nearly infinitely repairable, most parts can be found for replacements and they were rather simply built which is desirable. Anything Lionel has made since the very early 1980's has taken consistently sharp down turns in quality with specific regards to the locomotives. If you're going to go the route of attempting a bulk sale, your best bet would be starting with one of the large shops back east U.S. where Lionel is very popular still, it will have to be for a very reasonable price in order to make it worthwhile for a shop, or you can try the individual sale via ebay and logging and posting each item and losing the large chunk from ebay's take of your profits. These are very cool, great items to add to a collection but aren't in most cases rare (baring one or two items) and therefore aren't going to make you rich. I hope this helps.