Yes, they are plug and play.
It's indeed a good price, at least compared to current market prices. If you decide to buy it make sure that it's in fully working order. Also you may ask for more images of it, some of the cheaper ones have faded colors.
It is indeed a low price. Right now on ebay prices vary between £500 and £1100. All I want to say is that I'm glad that I have bought a mint one years ago.