I certainly would not buy one.
We've seen far too many systems here with:
Fail to boot up, right out of the box
DVD not physically connected
Overheat after 5 minutes. Why? CPU fan not connected.
Add to that the overall parts selection. You have to be laser-focused on what parts are included.
Add to that the less than useful 'warranty'.
You get 1 year from them, even though individual parts may have 2-3-5 year warranties if you had purchased them individually.
And often, you have to pay shipping both ways, for the whole system.
Oh yes....read that warranty in detail...