How close are you to them? My range is usually 60 to 120
bucks.
I normally give the max to close friends, even if I don't turn
up for their dinner regardless of location. I give the minimum to
not so close, regardless of location.
If not close, but good location, I give 80, so usually I give
60, 80, 100, or 120. Don't give odd values, odd values are for
white gold.