I bought mine s/h in mint condition about 5 years ago for just £400, boxed with original paperwork etc. off Ebay. I visited the chap to collect in person with a pile of info about snide Omega Seamasters in my head. It was a genuine one of course.
I've only had to do one battery change in the time I've had it and when I first got it, have the strap adjusted for my wrist.
Its worn almost every day and has never let me down. The face seems so scratch resistant its amazing and there isn't a mark on it still.
Brilliant watch and a bargain. I still love it too.
Buy one but try to get a mint second hand one as its best value.