Carolina Donz, Yuneec directly, or any authorized distributor.
Depending on how today goes, I have a NIB Q5004k (Bird, Controller, 2 batteries, hard case...) that has only been opened to verify all the parts are in it (Crashed my other - still flies, need to do a final long range test). Bought from Carolina Dronz mid February. I am sure Frank will transfer the NEW portion of the warranty to someone.
However - I doubt I will be able to do the flying at the places I want this year due to broken leg/ankle that will not be safe for me to do the required off roading so to speak for 6 more months season is over. $1000 sitting in a box.