qu1mbyHere are couple examples of fakes being sold on eBay - just search for these item numbers: 181681432672 and 231544765165.
You can see that the current fakes from China are a bit off when it comes to the camo color, likely because they're using cheaper quality G-10. There are also some small noticeable differences with the laser engravings on the blade, the size of the torx used for the pivot screw, the shape of the cutout for the lockbar, etc.
There are plenty of authorized dealers selling genuine Spydercos on eBay as well, but one should always be aware of knives from China and/or new sellers without much feedback.
It's $110 shipped on ebay for camo, and $95 for black.