that's why you meet in a public place, where people are around, not exactly watching your moves, but enough where you know they're not gonna cause some shit, and bring a couple more people incase shit does go down... or if possible, meet in your own house, where you know where everything is and they don't....

if you meet them where they are put in to a controlling situation, you're setting yourself up to be screwed, and even more so when you don't bring people with you....

always have a fail safe plan, atleast when you're dealing wtih that kinda money, and you don't know/trust the people...