I sold an item today with £2.99 p+p 2nd class. When I went to the post office I found it actually only cost £1.94 to post it 1st class.
I never intend to make profit on postage, and I packed it in recycled stuff so that didn't cost me anything.
I feel like the right thing to do is refund the buyer £1. Is this normal to do, or am I being a bit soft and looking a gift horse in the mouth?