Have you got any more details? like mileage? condition?
to be honest, there isnt usually alot in price between an SR and a normal L etc, the price difference varies more on mileage and condition.
not much help i know, but for a good condition, low mileage maybe around £900 (have seen good Sr's for lower price than this).
high mileage, rust on front crossmemeber maybe £500-600 etc.
sometimes you can get a real bargain, other times people think its a top model, so wack the price up