Best and worst money making products

Hi guys,
I'd like to know from your experience what money making products you consider worthy spending money for and what products you see as complete scam.

I know BHW is maybe the best source for anyone to start with IM but I'm asking explicitly for your experience with products you have to pay money for.

So it'd be cool if you could list up your best and worst ones and tell us why they are great or suck.

Thx all.

best money making products? those which were never made into a product, because they're that valuable
the worst? the rest (see live examples in WF WSO section)