Cracked forks - what to do now?

Managing returns and item not received requests
Returns for local collection listings should be treated the same as other delivery options. If the buyer returns an item because it's faulty or it isn't as described in the listing, they can return it to you even if your return policy states you don't accept returns.

https://www.ebay.co.uk/help/selling/posting-items/setting-postage-options/local-collection