Seems an ok price....
With any computer there are occasionally batches that come through production with defects, which is what Andy's experience reflects. Make sure the online shop has a return policy that will allow you to get a replacement if needed. Those units will not be repairable if a depth sensor or screen problem arises.
If you buy it from Leisure pro you will get it incl shipping etc for $310 http://www.leisurepro.com/Prod/OCNV18W.html
They are very good to deal with, I've bought quite a few things from them.