I know that in Europe, used Nokia 770 prices in eBay have decreased in the last week. Before they were at almost the price new from Nokia (above 300), but now even some advertised as new can be had for 250 Euro or less from someone in Holland.
There are a number of the usual mobile phone scams (that now include the 770 in their list), but they seem affected too: I see fewer of them.
It could be just a side effect of the holidays, though.