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.
I agree. During the gold rush those making the most money were those selling the tools. With difficulty shooting for the moon the 10 GH/s blades I'm running will be obsolete soon. Anyone paying more than $10 a G/Hs is sure to loose money.