Are you still looking?  Do you know exactly what model you are after and price?  You need to know so you are ready to buy when you see one for sale.

I think GW Cycle have a few unit. Not much lesser than a new unit but still 2K is good money especially in times like this. I think the Bs are from the UK used Bromptons store which might be imported through Singapore. I am not sure, else where can he get so many of them. Brompton buyers are not known to sell their Bs. Usually they keep them until they gather dust, hahahaaa. I mean a person who spends 7K on a folding bike are not in need of money usually.