Reputable UK used Mac retailers?

[iPhone 62S]

I want to buy either a iMac (the old ones with the circle bottom) or a eMac, don't care what spec as long as it's cheap, works and comes with cables, keyboard, mouse, etc.

I looked on eBay and saw quite a few, and they seem to be selling for a decent price, but they are either pickup only or have stupidly high P&P, plus the business of bidding and everything is annoying.

Anyhoo, basically, where would you recommend I buy a eMac from? Are there any UK retailers you've dealt with that you'd recommend?

Thanks in advance!