No man, sniping is just bidding in the last minute, usually the last few seconds. You can do it manually, use a free service or a paid service.

At the end of the day it's the highest bid that wins, not the last one. You can only get outbid by snipers if a) they're willing to pay more, which is the whole point of auctions, or b) you didn't bid as much as you were willing to pay, in which case it's your own fault.