Hi Paul/Jane,
I've just come back from spending a month on HR and at the risk of incurring the wrath of those running the golf shops over in Spain, they're more expensive than the UK.
I was comparing prices of Cobra & Mizuno irons and they were considerably more expensive over there. Didn't see much used stock though.
If you're looking to buy second hand, you would be better getting your clubs locally and paying the airline the £15 for carriage. you'll get a far better choice in the UK.