There do appear to be differences
- One does not mention what operating system it has; another specifies ubuntu (Linux); another mentions Win7 Starter edition
- On mentions a Lojack theft protection included
And reading the entire webpages may show other "small print" differences which are not included in your posted images.
That said, it's not unusual to find pricing variations. I paid $299 for my 10v at Amazon a few days before Xmas. It included Win7 Starter, a 6-cell battery (which should add $30 or more over a 3-cell battery) but no bluetooth module (I believe most ship without BT
, but it can be added internally with a module costing about $25 at eBay).
Netbook: Mini 10v, BIOS A05, OS X 10.6.4, 2 GB RAM, 160 GB HDD, BT