Uk trade plumbers advice required please!?

[robert william]

i've got some brand new boxed twyford thermostatic valves that after doing a little research i've realized there not cheap and probably worth trying to sell...... any idea of any plumbers forums or anything like that were i could advertise them ??? don't know where to start really.... thanks in advance

 

[Wirdy]

Gumtree or Facebook marketplace if you don't want post them or pay ebay fees.

Wouldn't think anyone in the trade would want to buy parts from an unknown source.