Doesn't need to be that much, or even have drugs. $3700 is enough for thieving police: http://www.aclu.org/blog/criminal-law-reform/easy-money-civi...

Police regularly abuse forfeiture. It's a horrible and very un-American thing they have going on. Yet because the money ends up in the police pockets, there's little incentive to fix the law.

http://reason.com/archives/2012/08/10/why-asset-forfeiture-a...