Ebay needs to stop recommending pricing that is less than £1.50. Reason being people are effectively forced to use PayPal which charges a high cost for processing, eBay charges it's 10% fee, items cost at least a second class stamp at 56p, packaging costs. It's like Ebay only cares about getting a sale to earn commission at the expense of its sellers making losses. If anything, I would recommend that Ebay charge a lower fee rate for items that sell for less than £2 including postage.
