This'll sound crazy but first off, the Big Lots here in Florida don't appear to carry too many models- what little they do have is what I'd call "typically generic"- race cars and an airplane of one kind or another- and little else...
Now, in Illinois- I save my money for the trip back to my home neck of the woods and shop at "what used to be a Big Lots" and is now some privately owned arts/craft/ retail shopping outlet...
Stuff I can't find in Florida, I know I can get in Southern Illinois- I've picked up a Polar Lights ["original"] Lost in Space saucer in custom chrome, a Revell repro of the Saturn V launch vehicle [the HUGE one!], the Monogram 1/32nd Apollo Command/Service module, and lasly the 1/12th Mercury Capsule- this place never has more than one or two of these when I've gone- but I can lay even money down that if it's something I'll want or need, if/when I make a trip, they have had it each and every time!
As I mentioned earlier- the store itself used to be a Big Lots- the sign is still on the building- just painted over and vynil lettering applied... I wonder if they're getting some of BL's inventory as a side venture?