L.M.
I bought one for my mom and she loves it. It was about $100 and that seemed pretty average. The only thing to watch out for are the price of the additional bags - it will be an ongoing expense, so you'll probably want a brand that you can buy conveniently and inexpensively. The one I got for my mom (at Bed Bath and Beyond - can't remember the brand) has the bags available at Wal-Mart so it's very easy for her to pick them up and she doesn't have to make a special trip to BB&B each time she wants more.
Update: Oops. I read it wrong, I thought you were talking about a vaccuum sealer. disregard :(