Have just sold some old textbooks. Had no idea what P&P would be so guessed, but I think I may have overcharged. I know they're paying for my packing materials too, so what do you think of the following:
£1.50 for postage that cost 96p
£2.50 for postage that cost £1.32
£3 for postage that cost £2.36
Obviously it's the 2nd I'm mainly concerned about as it's almost double - do yuo think I should refund 80p or so?
I also sent one at a cost of £1.95 and had charged £2 for P&P - so I promise I'm not trying it on, just clueless