Yeah, I have a suspicion that may be the case. I'm particularly suspicious that the brand, UPC and model number don't turn up anywhere else outside of eBay, and the fact that you aren't going to be getting something like a crank that's made in low volumes in a Western country for $25.
That all being said, if it shows up in a farmertec package with "made in China" on the side I'm guessing eBay would probably cover you if the seller told you to pee up a rope since it clearly states a different brand and country of manufacture in the ad. Depends on whether or not you want to gamble with $70 or not.