When a deal is too good to be true, then it is always a scammer trying to rip you off. No one sells a DECA for 5 life.
When I was trying to buy a DECA recently for 8 LIFE some smuck kept insisting that he only wanted 7 LIFE. He would not trade at 8 life. Waste of time, gets ignored but its no skin off him. He probably scammed a few people after I refused his offer.