Doing a search on this site will get you a lot of hits. I used to do business with Raidentech and Xheli (same company, same address), but I won't any more. I believe also that nitroplanes (is nitromodels the same place) owns Raidentech and XHeli. The following posts all refer to XHeli.com, but remember these may all be related. I know XHeli and Raidentech are the same place.

XHELI.com is bad business
xheli.com
XHELI IS LOWER THAN WHALE FECES
Xheli.com???

The last time I did a part-by-part comparison with helidirect for HBFP and HBK2 parts, about 1/2 are better priced at helidirect, and 1/2 are better at raidentech/xheli.

I have found, like Druss, that helidirect.com is an awesome place. Decent prices, great shipping prices and great turnaround time. I've also been very happy with jaghobbies, ushobbysupply, and ka-planes. There are other places which are good too, but those (including raidentech and xheli) are ones which I have personal experience with.