Bringing parcels into Spain from outside the EU will involve tax and IVA on the total of the cost of the goods + the transit cost + everything else they can think of. The tax is around 33% of the declared value of the goods.
I’m really pleased that Premier Tools are doing good business on ebay.es as I think it is rubbish and I sell far more on ebay.co.uk. Furniture is really too bulky, IMHO, but there is a lot to be made in toner cartridges, mice and other computer supplies for which the retail in Spain is 10X the cost in China.
The trick is to send to the UK and then bring down to Spain as you can see at http://www.citibox.es
Many Spanish customers use this service because people will not send outside of the UK.