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@quiltsandcrystals wrote:

so for you the buyer does not need to know the postage cost  is that whay your are saying. I disagree I think they do need to know.

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To be honest, I'm not exactly sure what you mean with your opening post, but in my opinion what buyers need to know, and what some may like to know is a little different. Some things can affect a purchase decision, but the cost of something to a seller and if/how that's passed on to the buyer is sometimes TMI. 

In some cases, items that can go as large letters for example, how something is being sent can be useful information. Take a DVD - one seller may send it as a large letter in a plain envelope, another may send it bubble wrapped and as a parcel. Both sellers might charge a comparable amount for postage - let's say an even $6.00. Leaving aside issues like the purchase price and which one works out to be cheaper overall, I might prefer the one being sent as a parcel - not because the postage price being charged is deemed better value for money, more because I can feel a little more assured that damage in the post is less likely, which might be important to me, especially if the purchase is a gift. 

In that kind of scenario, the cost (to the seller) of posting the item is still wholly irrelevant to me, what matters is how the item is being posted. I think sellers are better off highlighting the advantages of their particular service(s) than offering a cost breakdown. 

If you're more coming at the issue from the angle that some buyers don't understand that there are additional costs to packaging and posting an item, which are included in a P&H charge, then I think the same principle applies. I think that there is often more value in getting people to understand value than know cost, if that makes sense.