Just converted the UK number plate to Spanish one
 

Rover 75 Tourer 2001 Diesel 2.0 Auto (116)
Costs:
1. New set of front headlights - € 180 (€ 90 each)
2. Replacing the headlights - € 60
3. Technical Engineer arriving from Valencia, looking and checking the legality of the car (including taking photos of the car and its labels) - € 120
4. ITV - (Spanish MOT) € 110.86 (no normal cost because it is a "Usados Importacion")
5. Valencia - Treasury and Traffic taxes - € 462.25
6. Local (Ontinyent) Tax - € 107.91 (yearly)

The bottom line is a nice lunch-for-two change from a € 1000.

The alternative was: Take the car to UK (£700+), after paying the road tax (£250) and doing the MOT (£60)

Yearly insurance in Spain is € 400 - comprehensive with full travel assistance.
In the UK this is £704 without travel assistance.

Was thinking of taking mine over when I move over latter this year ,but I'm now going to look at buying a lhd mg zt when I'm out there :D
Ps I'm moving to torrox near Malaga