Is Coleman 5000 watts generator good?

Hi,
Someone is selling me his Coleman 5000 watts generator for $150. don't know much about generator but know I need one for this summer because last year we had a black out and had to deal with the hot weather.
Wonder if it's good and will it run a fan and household appliance?
it's brigg and tratton engine. the guys say it's in good condition and only need to pull it 1 or maybe twice. It has elecrtric press START but battery is dead. That shouldn't be much to buy new battery right? he is selling it because he is moving out of state and doesn't want to take it along.