Time.
My one buddy who used to deal, devised a system where he could talk about it on the phone or in text messages and it never sounded weird.
"Hey man, you got some time later? Maybe like 1/2 hour or so."
"Sure, I'll have some time around 5pm, come on over"
He never talked about money or anything. But minutes were grams and hours were ounces. And we were just youngins then, so there was no such thing as more than that. hahah