The only laptops you are going to find within that range are netbooks, which have extremely small screens and wouldn't be worth watching a movie on IMO.
I have a MSI Wind and have been extremely impressed by it. The build quality is vastly superior to most conventional laptops that are anywhere close to it's price and the screen is great.
As long as you don't mind a 10" screen it should be fine for what you need.
I assume you don't mind looking for something second-hand? You can get something with a 1.6-1.8 ghz Pentium M and maybe 512mb ram for around that price range on ebay. Lenovo T30, for example.
I have a MSI Wind and have been extremely impressed by it. The build quality is vastly superior to most conventional laptops that are anywhere close to it's price and the screen is great.
As long as you don't mind a 10" screen it should be fine for what you need.