Hot selling product on CB?

Here I'm asking to CB gurus to tell me a method how to find hottest selling CB product. I know we can find by gravity or with cbengine but I need most targeted product.

Also I'm promoting the thing on FB so please let me know the most suitable product according to FB criteria. to clear on FB it doesn't work on keyword basis it works on locations or age group basis. If anyone hesitate to post here then please PM me.

btw I'm already promoting DSP and mike garys thingy but still I'm not making a killing with these products which I suspected.