Terribly expensive...
Typical "looking for the greater fool" sale (approx. less than 60% ROI)...

I think by now it's safe to say it's impossible not to get a "greater fool" sale on EBay, as well as any shipping-ready low-end/medium-end hardware from a manufacturer. The only people making money there are the resellers.
Nothing on the market (ready-to-ship) seems to be even remotely able to ROI.
Everything else (high-priced pre-order gear) is the usual gamble.

IMHO if you have 900 quid to spend, buy BTC directly at a price you deem attractive.