Hi.
I use 'Do you Spain' to book my cars and have done for years and never once a problem......Many on here hate this booking company.
I use Alicante Airport and have just booked for two weeks in June at 30€ 5 door car.....Quick look on the Do you site for your Airport and most are upwarrds of start at 280€ ish.
I buy the rental company own insurance and never a problem with any car....Many on here consider that one big rip off.
I buy full to empty, never a problem.
I don't consider anything with the rental companies a rip off, never had bad or unreliable service, never had rude staff.
At the end of the day it's all a very personal choice, my last rental came to 293.93€ plus the 35€ for a car = 328.93€, (15 days) = 21.92€ a day approx. A friend came over to the UK for about the same time and paid almost £600.00 approx £40.00 a day.