Item was plainly "not as described" Mick...I think you have a good case for a full refund to and from with Paypal or Ebay.
In some of the cases I've had of the item not being as described, the seller offered up front to refund the return shipping as it was their mistake, which IMO is an upstanding seller and one who plainly accepts 100% responsibility for their listings. I wish all sellers were like this as on the flip side, I've lost a fair amount of money over the years returning items for the same reason at my expense. I guess it depends on how much I initially spent on the item, and how much money I want to be out overall if I just keep it and forget it.
I would leave "proper" feedback either way! In this case, while she did offer a refund of the initial price plus shipping, IMO she should pay for return shipping as well if she sent the item knowing full well it was not as described.
Darin