If you want further evidence of the calibre of the seller, who “is saying he only bought most of the item a few months back brand new”:
One of the quads has “quadhut” battery straps. The Quadhut Facebook page hasn’t had a post on it since 2018 and their domain (quadhut.com) no longer exists.
But, as ‘Our Graham’ used to say on Blind Date, the decision is yours.
The guy ended up being a dick he lowered the price even more and messaged me asking if I was still interested as he had someone else or want the stuff and I simply said “I see you lowered the price?” And he said yes I did I’m Willing to take £250 it’s a yes or no answer, and then left the Facebook chat before I could answer. So I told him exactly what I think of him and blocked him
They said they think they are V2 they said they bought it all 3 months back but never got round to using any of it and they need the money for another hobby