Having offered stuff free on TAS before, for postage only, I can say that I feel for clansman. Packing up lots of parcels, working out who ordered what and getting them collected or taking them to a collection point, all to help other folk out, is time consuming and definitely intrusive into your life.
There are postage contributions I've never received, and even payment for sold items that I've never received in spite of repeated requests. I've decided it's a mug's game, and I'm not doing it any more.
Have you checked whether your postage costs have been taken out of your account? If not, stop the cheque and forget it.