80% of my purchases are online. I never buy used either. I used ONLY known reliable vendors (like the 2 sponsors of this forum). They are always in the USA too (one exception... one order for the Cactus V2s triggers out of Hong Kong, even then, the 2nd order went to MPEX, which is out of Ohio).
I do it becuase I can make purchases a LOT cheaper online than from any local brick and mortar or internet store in Canada.