Ok u can do this 2 ways. Wut u do is use the 30k resource kit to wut resource u want and have it on the final step to pick the resource u want then u want then u can put the resource kit forsale on ur vendor for somethin cheaper then it would normally sell for, so pple come to buy it quickly. Once they buy it u get the money and then u hit OK to complete the process on the kit and it takes the kit out of ther invintory and gives u the resources and u get to keep the money. The other way u can do it is to trade it to them and have it rdy to hit OK on w/e resource ur getting and it will take it out of ther invintory.
If they ask u wut happen to there kit the just purchased tell them u have no idea and that u just put it forsale on ur vendor. They will usally contact a gm and they will just give them a new kit or tell them they cant do anything. And u get to keep the money and the resources.