Forum:Buying lot from amazon??

recently, i been thinking about buying so called lots from amazon, its 100 cards and 4 rare and a ultra rare for 7 dollars, should i buy it or is it just a rip off?(it sounds too good to be true)Alot of people who bough the item said they got good stuff from it, also, i found this 3 booster pack for one sale on amazon, the booster is lost millenium, and people say they got some good cards from that too, soooo...should i buy those?