I believe you have no warranty coverage with this used drone. The law you're talking about does not require the manufacturer to warranty it for two years. It is the vendor that has to supply it for two years, unless it was a direct sale from the manufacturer. Even then, the law only covers a defect that was present when the device was sold new. Also, I believe that it only applies to the original purchaser buying a brand new product, not to second hand devices.
I would call Yuneec EU and find out, but I don't think you have any warranty on a used drone. I would spend the extra on a new one, because if you read through these forums, between glitches, firmware issues, and even some human error, Yuneec is one of the best you'll find at standing behind their product and warranty. Without it, you could easily be out ore than the $250 with a single crash. Hope this helps. Good luck.