If all is as described it is a great deal. I paid about the same for the CNCRouterParts NEMA 23 kit which is similar, but with no software. (I am quite pleased with it).
It seems a bit too good to be true though. The seller has a similar auction for a 4-Axis kit with a Buy-It-Now price of $445 which is a bit odd. On that other offer he makes it clear that you get Mach3 software, but not the license. No deal there since the software is free to download from Artsoft.
I don't use BobCAD, but I did look at it, and as I recall their list price was way more that the seller is asking for the whole package. I'm sure he gets a discount if he really is an authorized reseller, but I wouldn't think it would be that much.
The "home" switches are not what you want, but for what you would save that's a non-issue.
I probably would not buy this, it just doesn't "feel" right. Nevertheless, it is a great deal. The seller doesn't have too many eBay transactions recorded (166), but has a 100% rating.