Well, I just noticed today that the price had gone up at the Sony Style Canada website and also at the ncix site. It was $299 just a day or two ago. I don't know if they have done this at the physical stores but it seems likely.
Maybe they're reflecting the beating the Canadian dollar has been taking.
Ncix had a sale price of 279.99 up until 11pm (Pacific Time?) tonight. I'll be watching to see if the 505 is in their next sale.
Incidentally, did you happen to notice if they had any blue 505's at the physical store? (and have you seen the 700's screen to compare?).