I thought that too, but then I found the ZTE Tania, for £69.99, same seller as the Open. It's a Windows Phone, but it's got a faster CPU, 800 x 480 screen, 217ppi (vs. 480 x 320 on the Open), bigger battery, more flash. No micro-SD slot though.

http://www.ebay.co.uk/itm/Brand-New-Unlocked-ZTE-Tania-Windo...

Comparison: http://www.gsmarena.com/compare.php3?idPhone1=5320&idPhone2=...