I get such a kick out of it when people send me $2 bills for ordering Zine World. I just can't bring myself to spend them on banalities like postage. I've traded out a couple for $1 bills (from my non-zine funds). I usually keep one in my wallet, just for emergency cash. (And it has to be a really tight emergency before I will spend it.) I've put one or two into my son's 'special money' piggy bank. Occasionally I'll use one for ordering another zine. Feels right to spend it that way.