Posted: Sun Mar 10, 2019 11:26pm
RHD cars in Spain are a bit of a pain - car park barriers, toll booths etc. More care and attention is needed on junctions. And it isn't cheap to re-register a UK car in Spain .... usually 1200-2000 Euros (ITV, taxes, headlights, possibly rear lights, gestor fees).
But used cars are significantly more expensive in Spain than in the UK.
So I suggest you work out what your car might sell for in Britain and how much you would need to pay to replace it with a Spanish one (eg. Autoscout.es), and compare the numbers with the import cost.
My wife and I imported 2 cars - an old sports car (that I didn't want to leave behind) and a LHD Honda that we bought in Britain that that beat the numbers test.