Not really, but half decent prices would be alright, I mean they must be raking in cash for some of the prices on accessories. £64.99 for a 20Gb HD & £54.99 for a WiFi adapter! That's already just under an additional £120 needed for a large proportion of the market.
See above.
But Sony wouldn't charge a high price for official hardware? Right?
I'm sure Sony would sell cheap hard drives and WiFi adapters if the PS3 didn't have them built-in, right?