The average going price is about $90, according to prepal.com but, as I oft found, it greatly depends on a variety of factors, including condition, pay terms, description, seller experience / feedback, photos, day / time of day etc.... thus many times you can get a much better deal. I personally might pay about 100 bucks for one in really good, mint condition. What's it worth to you?
All you need is RCA cables.