Wont drop that low.
Not everyone with a standard or Ultra wants to, or can afford to move up to the 2. The price of the 2 is high, compared to the old entry price of a standard, and there are a finite number of standards and Ultras in circulation.
Somewhere around £1000 for the standard and £1300/£1400 for the Ultra I see as fair settled price. Thats somewhere around Euro 1150 and Euro 1500 respectivly.
Ultimately there can be 5000 spare 2s at G66, but if you dont have the Euro 2300 asking price and want a Fractal unit - the only way is used, and the finite supply of used units will keep the price reasonable.
I see "wanted" adds asking for Standards for 900/1000 Euro and Ultras for 1200. Thats just not going to happen UNLESS someone needs less than that to upgrade, their 2 is ready for shipping, and they want a quick deal (rather than 7 days on EBay) and are happy to take below market value because its enough for their needs.
Last couple in the UK went for around £1150 (standards) so even with ebal listing, final selling fee and paypal costs, thats still around £1080 clear. £850 (which is the 1000 euro mark) is just a dream for all those hoping to snag a super cheap unit.