Yes I agree that some sellers take advantage of postage costs. They should only charge what it cost them to post.

I think it would be a good idea if sellers are obligated to itemise the cost of postage in a special section on their description page or in the shipping/postage section.

E.g.
Bubble envelope $1, Stamps $1.10, Registered label $2.80, tissue paper 10c Total $5

One seller had a really nice Pandora bead I wanted but charged $10 for regular post (not even registered, that would be another $2.80 extra!!!).
As my total cost list above shows, it should not cost more than $5 for reg. post NOT $12.80!

I also questioned another seller about the high postage and was told that he added the eBay fees and the PayPal costs to the postage!
This should definitely be calculated into the selling price, NOT the postage cost!

I usually tell them that because their postage costs are too high, I 'm not interested in their item and won't be bidding on it. Such a shame... sometimes I'd have loved that specific bead or item, but the ridiculous charges for postage repel me!