Kj356,
Nice setup. I love the Lionel HO stuff. While it may not be as well known and popular as the O gauge stuff, those who follow Lionel HO value it. As was already mentioned their is value in the memories. However there is monetary value as well. From what I see the most desirable (and expensive) piece is the snowplow engine. Hopefully it works and you have the box. I am reluctant to give dollar values here, so do a search on Ebay. I just took a fast look and there are none currently on auction. I think you'll be surprised at what they can sell for. The operating accessories and the operating cars are what I like the most. Most HO'ers are into modeling and prototypes, while I like the play value. They are toy trains after all. I am happy to see such a nice running Lionel HO layout.