Was at an open front bar the other night(whole front is open to the street) and a street artist stood outside, casually sketching the activity at our table. He then asked us if we would buy it, and no one had much cash. So my friend offers him a trade. He put up a knife, some various art supplies, 2 dollars and about .3-.5 grams of herb. Artist took the pens and the herb, thanked us and headed on his way.
The sketch was entitled "Giving up the recipe" (were all chefs) and it was EXCELLENT. Had any of us had cash money on us we would have gladly paid what he asked for it. He captured not only what we look like but the energy in our conversation as well.