I have been approached/hounded by friends in the past to buy:
Candles from PartyLite
Supplements from Herbalife
Face stuff from Forever Living. Most of the time the poducts have been quite good, but really expensive.
It has made me distance myself from people, especially when they start going on about how successful they are and that I should have a go etc...
Just thought it might be interesting to see how many of these types of companies are out there.