I doubt this "museum" ever actually existed. My guess is it was a tax-dodge to support someone's model railroad and vintage motorcycle hobbies. The address of the "museum" was a private residence and the guy running it was selling model trains out of his garage. For a donation to the museum (again I use that word ironically), we were supposed to get dealer pricing for life on model railroad merchandise. After raking in donations they abruptly closed up shop and disappeared.
Review from Guidestar
Brought a couple of old trains I found while cleaning out my dad's attic to donate. John (the founder) told it was worth $20 but then told me if I paid him $40 cash he would give a receipt for $250. Just wanted to see my late Dad's things go to use. Felt really uncomfortable and got out straight away!