Birch,
There are A LOT of used scrollsaws available. My big delta I picked up off of ebay (way back) and they guy I bought it from gave me cases of good saw blades.
I think that a lot of guys buy a scroll saw, don't use it much or know what to do with it, then try to get some of their cash back. Check out Craigslist to see if there is someone in the area trying to offload one.
for example, near me there are 6 from $30 to $100. I've seen the dewalts as well.
http://washingtondc.craigslist.org/s...min&maxAsk=max
If you've used yours a lot, it's probably the brushes, or a bunch of dust built up on them. Unplug the machine, Pop them out, see how they look. If there is plenty of brush left, gently blow some air in the holes to push some dust out of the way and reinstall them. You may be lucky. I've had this happen with angle grinders and metal dust.
If you're not comfortable doing this sort of thing, you can probably find someone local to do it for a reasonable price.