“In order to use the elevator, you will need an access briefcase, the case has special wifi technology allowing you access to certain floors depending on the access codes you collect.”
“I have a briefcase that already has the access codes programmed in to let you access the second floor. If you really need it maybe we can do a trade. Right now I am in need of 10 Bottles of holy water, 10 apples, 10 microchips, and 100 dirt.”
“If you have enough would you like to trade?”
Yes I have enough, deduct the materials you needed and give me that Briefcase!
No sorry i dont have enough, or I think its too expensive