@neato, if I were to buy a base from a reseller, how would I know if it is a new one or not? My base is only a few months old and was purchased way after v3 neatos were already available. I had no idea about incompatibilities at the time as I then had an older model. There is no indication anywhere as to the version of the base before buying.
current bots: Roomba 770, Evo Mint 2, Vorwerk VR-100, Neato XV-25, Karcher RC3000, Hauzen VC-RE70V, Robomow RL350 (lawnmower)
previous bots: Samsung SR8845, Neato XV-15