There was a very large HO gauge train collection at the first place we went, they had a Burlington engine, coal car, and a caboose that I would like to have had but I resisted.
The rest was kind of lame stuff.
I have been looking for a corded drill for the shop,
they had three but were all only ⅜"I would like a ½". The second place was a bust.
Last week I went to one that had about 100 gum ball machines, I was helping the bil and lost my focus, I didnt get any and now I'm regretting that one, they were nine dollars each.

See if this app works in your area, I have filters set up and they email me a list of sales within 30 miles of me every week. They post pictures of the individual sales so you can get a feel for what will be there.