I have a Schwinn spin bike and use it as well as a standard trainer all winter long.....we are still having winter here in Maine by the way, more snow predicted for tomorrow...ack.
But I digress.....
I purchased my spin bike brand new for about $500 from a local bike shop because it was "last year's model". I love it as a training tool...and as others have pointed out it is not nearly as noisy as working out on a trainer.
If you can, try out the spin bike model you would like to purchase before you actually place the order. I really don't like the Lemond RevMaster for example because it is belt driven and I don't like the feel of the belt at high cadence or high resistance. On the other hand the RevMaster has many more ways to adjust the fit of the bike compared to my Schwinn and that may be more important to you.
-traveller
"It never gets easier, you just go faster." -- Greg LeMond