But if I offer a free gift with purchase I can send that immediately via RM signed for and therefore be able to upload tracking number to Amazon. With a nice note to the buyer explaining how the other part of the order would have been delivered by now/will be delivered soon.
Cost of postage and gift would still allow profit. Any major obstacles I may have missed please? I see no reason for complaint if looks good on paper and the buyer gets their item(s) in good time. I looked at paying for tracked delivery but that's £4. A small gift plus postage may be around £2. Makes a fair bit of difference to profit and competitiveness on Amazon or elsewhere. I might just do it on eBay instead.