I just wondered and thought of a good suggestion for ebid is updating the shipping

at the moment i say wait for invoice for me to ammend b4 paying
for example

offer free shopping if cart = £x.xx

or

Shipping rate based on weight of cart (i.e . UK up to 1kg = £1, UK up to 2kg = £2
and so on) worked out automatically by our settings

or

shipping rate based on entire cart or qty of cart

i am sure that this will encourage bidders to buy more items from each persons store