i paid 1200 for mine.also off ebay.93 540 auto with a knackered master cylinder,which cost me sixty quid from the scrappy.i have done 8000 miles in it so far and it hasn't broken down and has not used one drop of oil.used to put oil in the shonky old sierra every couple of weeks.on mine all the windows have one touch operation to go down and the drivers one also has it to go up as well.don't know if yours is the same or not.
bryan