What should I expect to spend? Used, and new?

If you are talking the blower assembly for the heater, it is quite easy to replace...three 10mm bolts and the connector if I remember correctly (after removing the cosmetic covers under the glove box). Pull a Part price for a blower is under $15.

What should I expect to spend? Used, and new?

I did this 1 year ago and I'm pretty sure that you have to remove some associated ducting to access the 3 bolts. It was a bit of a hassel, but not a major deal and it goes back together pretty smoothly.

 

Good luck.