I do some (a lot, but hey, who’s complaining) social media work for a non-profit association.
And if you think it’s difficult to get folks into your resale, thrift or consignment shop so you can find them something to buy, try asking people just to give you money!
This article addresses the fund-raising world, but I know you’ll find the Four Factors helpful.
Auntie Kate The Resale Expert 
Inspired to respond? React? Rebut? Just feeling chatty? Go ahead, use that nice keyboard in front of you...