Hi iv been selling on here for just over a year and am having issues with buyers not being happy with postage costs for their items...

all of the items i send registered post with tracking minimum, and in all my auctions i request they prospective buyer to contact me before bidding with postcode so i can get costs from the autralia post online website, some of my buyers choose to do this some dont... Now my issues arise im struggling with good feedback for my postage costs as the australia post website seems to be over quoting prices and if i lower the prices i charge to less than shown on their website i will loose out...

When iv been quoted 1 price on australia post website, then when i post item off am being undercut on postage costs.. And evn its only a $1.00 under this seems to displease buyers even though i charge nothing for expensive packaging... 

Has anyone else been encountering these issues and can anyone please help with advise as i really like doing sales on ebay and using it to support our family .. Any help would be great thanks Kathleen