In the words of the song --There are more questions than answers
If you buy a used spanish car from a dealership do they take care of handling/checking all the paperwork--NIE and the like, or do you have to vist the relavent offices to get it done, and if so, does it take ages to get it all sorted out?
We try and get over to Valencia 5 or 6 times a year and like the O.P. are finding car hire to be getting more and more expensive--despite using one of the cheaper companies.
Just back from a weeks stay at the start of May and found that the headline-or- "Gotcha!" price of 106 euro ended up at 211 euro with the addition of the tank of diesel, extra insurance for tyres/underbody ( we visit friends who live a mile up a mountain assault course track)--then if you read the small print on the extra insurance you find out that there's a 300 euro excess.
This same company used to give 2 drivers allowance-now you have to pay an extra fee-so this time we opted for me not driving ( relief-'cos I don't enjoy driving in Spain-which is strange as in the u.k. I get white line fever and love driving everywhere)
If you buy secondhand-say something 3-4 years old and insure with a spanish company-do you build up a no claims bonus as in the u.k?