Hmm. Some people are too shady to be trusted.

[Kid Dynamite]

my mate gave somebody £210 before he got the weed
but he got the other person to hand over a ring and a gold chain
so we knew he would come back

good idea to get some collateral. However bear in mind if the guy really wanted to rip you off then a cheap ring from argos and a "gold chain" from down the market wouldn'tmake much of a dent on 210 clean profit.