I try not to over-charge on postage
All I do is charge for my packaging materials I buy weekly, packaging is always expensive but I try to keep it as low as possible
Packaging materials are
Ink for printer as I always post using paypal postage
Bubble wrap for the items and the boxes they come in
Brown paper to wrap the box/items up in
Cello-tape for wrapping he bubble wrap,brown paper and cello-taping addresses etc
My petrol to drive to the post office with your parcel
I try to charge around 25p-60p per item, all depending on the size and weight
I always wrap items in bubble wrap. No item will leave my home without bubble wrap protection unless it has it's polystyrene package to protect it. I like to post items in the condition I would like to get them in.
I always give regular bonuses and postage discount to regular buyers. I always look after honest, genuine and trustworthy buyers as they are so hard to come by.