Someone mentioned Maple Leafs tickets upthread.
Not quite the same thing, but I bought (Lord of the Idiots Costanza!) a ticket pack for the Memorial Cup this year.
Due to some last minute switching of plans, we had a pair that were going to go unused, Guelph vs Edmonton.
As I live not very far from the arena, and had about 1/2 hour to spare, rather than waste the tickets, I drove downtown, double parked my car, stepped out of it, and, holding the tickets in the air..... yelled "Anyone need seats for today's game?!?!?"
A few people said yeah, came over.
I explained the situation, I would give 'em away, but if someone wanted to offer me some cash, every dollar would go to the local food bank.
Two guys said yeah, I'll pay you for them, they bid each other up to $60.
Every $$ went to the food bank, tickets got used, couple people got to go who otherwise wouldn't (and saved $120), face value was $180.
Win, Win, Win.