I found a blog that hosts themed paper swaps each month. It might be fun to send your unwanted paper to someone else. You know...one crafter's trash is another crafter's treasure.
She has the year already planned, so you can grab papers for future months. Sure, you get back more paper, so if your goal is purging, this may not be for you, but just think of the possible treasures you could get in the mail. SURPRISE!