Anyone who sells on Ebay can donate a portion of their sale to the Red Cross(or other nonprofit). When you fill out your listing information, there is a list of nonprofit organizations right under the duration section of the form. You’ll have to register with Missionfish to collect the donation. Missionfish is the organization partnered with Ebay to ensure the donations get to their recipients.
From what I am reading, money is most needed at this time as they do not have the manpower/space to organize clothing or item donations effectively.