Old gear

I’m in the early stages of starting a nonprofit that introduces kids from underserved communities to skiing and snowboarding. One of the biggest barriers is the cost of equipment, so I’m trying to collect used gear.
Does anyone know of ski shops, programs, schools, mountains, or organizations that donate or collect used skis, boots, helmets, jackets, snow pants, or other winter gear for programs like this?
I’m located in Maine but would be happy to travel or coordinate donations from elsewhere if possible.
I’d also love to hear from anyone who’s started a similar program or has advice on building a gear library. Thanks!