I have brought stuff (same items) from both hi-etech and YallStock December 2012. In both cases, the items were shipped very fast. YallStock had item location on eBay listed as California but both hi-etech and YallStock shipped from the same town in New Jersey.
The items were battery boxes (for 2 AA battery) with switch. The ones from YallStock and the ones from hi-etech are identical.
I am happy with both of them - well, the stuff could be cheaper… Both were a bit more than the same thing from China but I didn’t want to wait that long. The price delta is not a service issue. Higher price is to be expected since the warehouse cost in NJ is a bit higher China.
So overall, I got my items reasonably fast, the transaction is without surprises, and the items are as described. I will buy from either of them again.