My friend bought from there before and it went through smoothly.
You also want to check this out if you plan to buy: T-Dimension and codes on E-Bay - PentaxForums.com
If you don't want to wait for group buying price you can also buy from t-dimension: Pentax : T-Dimension, Your Online Store of DSLR, Digital Camera, Lens & Photography Accessories
I own the camera but for that price, you should look into K-x or the upcoming K-r. No doubt it's a good camera but the ISO performance are limited to 1,600 and AF tends to hunt a lot in low light situation. Metering is also not accurate in low light condition.