"Now, now, Gao, you are getting a bit excited by all of these big numbers, I think. That 15k is for buying the card, and for your sake, that is what we'll do."
"Sure, the 'orc and the bear' could maybe steal the card, but think how that plays out. If we show up at the meet as your representatives and then steal the card, the blame lands on you. If we go the meet and just rob him without mentioning you, you will be blamed for not having a team there that might have bought it from him first or protected him. If we rob him before the meet, he'll wonder how anyone knew that he had the card AND that he was about to sell it, and his suspicion will land on you. No, the only way that we get the card AND your name stays intact, is to pay your seller."
"Besides which," he adds piously, "we are are private investigators and protection specialists, not a bunch of criminal shadowrunners who commit crimes for hire. And THAT is why you trust us to sell the card to your customer, rather than keeping the card for ourselves or selling it to the highest bidder. If you hire pure criminals, you could have both seller and buyer angry at you."
"Now, if you are saying that after we sell to your customer, that we don't need to worry ourselves about paying you back the original 15k, then that is a different matter."