What camera do I buy? / general gear talk

I sold my 5d3 and lenses/flash gear to them a while ago. Probably 2014? Got a fairly decent price. Free collection etc (though I was in Brighton at the time so actually just walked over and dropped off) Took a while to get paid but got it eventually. Haven't part exchanged though but presume similar process.

They offered me a shit price for a lense I was wanting to trade in against something that had that was top dollar. I avoided.

Has anyone used https://www.mpb.com/ for part-exchanging camera equipment? Any tips or caveats?

There's a thread on another forum where people are complaining about increased turn around times for traded items.
Buying from them still seems to be ok, bought something last week and it arrived the next day