car rental in Spain

[bob swanson]

I need to rent a car in Barcelona in September and while researching various car rental agencies have discovered a large discrepancy in rates. Any thoughts or suggestions?
BS

[bobby.roberts]

Have you tried on here http://www.travelsupermarket.com/travelmerge/travelsearch.aspx?package=6 we got a weeks car hire in Barcelona off here last year best price was for us was from holiday autos though might be different now!