And how the hell would they sell fake software and get positive feedback? The buyers don't realize they just bought a fake when the company rejects their license key?? That makes sense, not.
In that sense, only CD-Keys matter. I'm not gonna expand on how blatantly spread they are over the internet. The only way they'd know if their software is fake is if they try to register it, and not all software would even demand that you activate your product so they can verify your key.
I'd only trust eBay when the item in question doesn't really matter if it's a knockoff or not (products that aren't electronics, or software, etc). Example, I wouldn't care if the PSP PlayGear Pocket casing I got for $1 would be a knockoff or not, since it would still serve its purpose of protecting the handheld while still being a good purchase for its price.
In any case, TC, just grab the academic license for cheap. Click here to see if you qualify for it. And unless your school or college specializes on digital media, I doubt they'd have licenses ready to give to students.
Check your pm.
I can help you.
Greeeat. -_-