Bizarrely, it is perfectly legal to buy and sell all of the equipment.
Some of the acoustic fans do have legitimate uses in workshops, etc.
Tenants turned a house I let into a fairly large scale cannabis farm ( 200+ plants, 8 van loads of items seized), I gave away lights and a lot of fertiliser, etc until I realised it cost £90 a bottle, and the lights over £500, back in 2015.
I sold via EBay.