Sellers may only list items for charity without eBay Giving Works if they:

Are soliciting on behalf of recognized tax-deductible charitable organizations (for example, 501(c)(3) status or equivalent with the IRS).

Receive advance written consent for the solicitation from the benefiting nonprofit.

To verify you received permission, you must include a scanned copy of the consent in your listing. It must appear with the nonprofit’s letterhead, signed by an officer and include the nonprofit’s tax-deductibility status as well as your name or eBay user ID, dates of event/listings, and donation amount (percentage of the final sale price). It must be large enough to be easily legible, and it must appear as a picture rather than a link.

Are you a 501(c)(3)?

Nice that you are trying to help a friends family. Looks like you'll have to pay listing a fee.