i've done damn near 4,000 transactions on ebay (99% as a seller, i spend 8 hours a day doing this stuff) so i know what it costs to ship stuff. asking an extra $5 for packing materials, gas and time spent shipping is ok with me. if it's someone that only does this stuff on the side i'm even more ok with it. i've got all the materials at my work to do this so it's not more than packing an item (takes less than a minute for most items) and printing out a shipping label or walking it down to our shipping/receiving guy (for UPS).
i hate paying more than actual cost for shipping when i buy things (i always refund people if they pay more. happy customers = repeat cusomters) but i understand why some people do. the same goes for giving people killer deals (under cost) at times.
i don't know if you've ever had to buy large boxes. i needed to buy some for a couple of Thunderheaders i had and the boxes were $15 each. if you need to buy the stuff to ship it can add up. box, tape, packing materials, my time, shipping/receiving guy time, ebay fees, paypal fees. that can easily be $50+ on something that sells for $300-400.
that got a bit long winded. :laugh: