"I bought an arizer extreme q 4.0 from the ebay seller rubberneck. Everything seems to check out, I got my vape in reasonable time. The only screwups from the seller are A) forgetting the apartment number on the shipping label, B) putting pics of the vape and all this other informative information on the box, trying to get it to come off as a potpourri device... i don't need my apartment leasing office to know that i have a giant vaporizer in my room. Other than that I have no real complaints, and it is quite nice. I don't know about the warranty though, I assumed I had it, but i'll monitor this thread for updates."
I dunno, that person doesnt sound too disappointed. I think buying through ebay might offer some level of buyer protection usually, so I'm fairly confident youll get your vape. Sounds like the worst case scenario is that you wont have the warranty to go with it if its not an authorized reseller for that particular vape.
Im not sure if you can cancel purchases on ebay or not, but maybe contact them and/or seller to try if you think you should. If you havent paid for it yet you could just choose not to and risk a negative ebay buyer feedback.
Theres also more than likely a return period. you could just not use/open it and send it back.