Yes, Spanish rates have gone up a lot recently. But they are still lower than the usual offenders in the UK and elsewhere where many airports charge ~ £200 for a landing and say a night's parking.
It depends on how often you go somewhere. If I am going somewhere far away, just once and never again, I am OK with £200, because I probably spent more on fuel and will spend something similar on a hotel for a night or two. At £50 I might go there again. But £50 is too much for regular visits and the evidence is that it kills of most GA activity - which is usually what the morons (with greased up hair and MBAs from the Univ of Upper Warlingham) which run most airports want, as soon as they a call from God (O'Leary).