Wow ... that was very interesting to read ! :-)
Thanks for letting us know.
When I looked at your great custom-dollies the first time I guessed that you work for the toy-industry.

I have never run into problems, but for sure I would think twice before buying from anyone other than a very reputable dealer, or the designer himself/herself. I think it is harder to tell with cast stuff, unless it is a figure or something that has never been produced (thinking of some Strawberry Shortcake figures now).These days many of the so-called "prototypes" of action figure lines you run into on eBay or other places are actually BOOTLEGS produced by the Chinese factories by unscrupulous workers after hours to make some extra money...