I'm not playing devil's advocate; I really would buy the DDP N900 if I could. And at that price, I would use it solely for development (because there's a limit to how often I want to be reflashing my actual day-to-day phone).

I look at it this way: if it costs E250, and has a 20% chance of costing me say E200 for an out-of-warranty repair, that's equivalent to an expected cost of E290 (=250+0.2*200). A bargain, despite the lack of warranty.

Put it another way: if anyone wants to sell me their N900 for E250 with one week's warranty, my PayPal account is ready and waiting.

Regards,
Roger