The prices on these things seem to vary wildly within a $70 range.  And they seem to be at the bottom of that range today, at least at Buy.com.  They’ve got the 160GB/6-cell battery version in Sapphire Blue on sale for $329 with free shipping.  That’s a great price for this model. 

Figure another $10-15 for the memory upgrade and you’re good to go for under $350.  Not bad at all.