I'm not saying that seller is selling a phony item. But hopefully people won't find out a way to "microplate" plastic in metal.
Otherwise, you are going to see a lot of phony Wacky Mini metallic super rares like BarKist and Windhex sold on eBay.
If people can master 3D printing or make counterfeits of anything in print, someone will find a way to make phony Wacky minis.