Do you refund postage if you have overestimated?

[Polgara2]

am still very new to eBay selling so bear with me! How much difference do you think is acceptable before you would refund the buyer? I just copied the postal charges from similar items when I listed, but it has cost me £2 less.
Thank you

Yes I agree Sarah

You bid on an item and expect the postage to cost what it says.

some people put a price and it actually costs no where near that amount.

I understand mistakes can be made but I don't think sellers should use those oppurtunities to "earn" a little extra cash.

eBay says P&P not "shipping and handling". so what ever it cost for the packing and the postal charge. I don't believe you should charge for the car park, petrol, bus fare to post office at all. If it costs you to use the post office then don't bother to sell on eBay.

exactly teatea, most private sellers call at PO on way to somewhere else, if you are a business your time and handling costs are already costed into your selling price

I think if you are selling clothes that are put in a bag with label 30p over cost of postage small breakables in box 50p large breakables £1 unless highly valuable antique large flat screen Tv etc can not see any justification for more than £1 over postal charge