I donated a couple years ago so the nice young lady would go away and I could eat my warm dinner. I don't remember how much I gave Her. I remember it was pretty generous.
Last year they called repeatedly and I offered the guy $20 to go away and stop calling me. The guy says "we are looking for more like $180." He finally accepted the 20.
This year they have been calling me every day for months, usually at dinner time.