It depends on what type of swing you get. you can get "take-a-long" smaller swings (there usually cheaper then the other type).

Why not take a look on ebay... i purchased a NEW Jolly Jumper with stand on the weekend for $80... The stands alone are $120 plus the jumper is $60.

You might get a bargin and if not you'll get an idea of what there worth and whats around. Could even pick up a nice used one