.....And a heads up.

Received an item, it doesn't fit, ie. it's incorrect.

So i've tried to return it through ebay's process and selected 'it
doesn't fit'.[1]
Ebay were trying to charge me postage, I don't want to pay postage
through ebay as they are charging about what the item is worth and in
any case return postage should be at the sellers cost.
(As it is i'm not that tight but it could have been posted as a large
letter whereas ebay are trying to charge me for a packet)

So I try to start a new return, noting that in the options is 'more
reasons', clicking this displays 'item description incorrect'.
We try that. But apparently there is already a return open now.
You can't edit a return reason and if you close a return you can't start
a new one.
Arse.

[1] Presumably this is pertinent to clothes and similar.