Hi all Sold 3 games on ebay (seperate listing for each one) and the same person bought 3 of them. Postage on each was £1.50, but since she was buying the 3 games.. I was going to make postage £3 for her, rather than the total £4.50. Anyway, sent invoice.. £1.50! forgot to change it, so i've messaged her asking her to send me £1.50 more as I will be short changed otherwise and she already got a right bargain with the games at 99p each! - I didn't say that to her. Am I right doing this? can she cause a stink?