It is best to meet up with strangers in person and in a public area.
Alternatively, you can look to online forums and other buy/sell websites such as Craigslist where you are able to meet up with the seller in person before any money is exchanged.
Each time a couple has intercourse, millions of sperm enter the race to be the first to meet up with the egg.
In Toy Story 2, a set of three LGMs meet up with the main cast in a Pizza Planet truck.
Without the need to talk on a cellphone, you could locate where the rest of your family is parked and meet up with them without any significant effort.