Here’s a new rebate from Filtrete Filters via coupons.com.  Filtrete are high quality filters that last longer than most and do a better job.  My family has used this brand of filter in the past and we’ve been happy with them.  Offer expires March 15, 2010.
filtrete-micro-allergen
Save $3.00 on Filtrete Air Filters, 1000 MPR or higher via rebate

Fill out your name, etc and download the rebate form.  You may purchase the filter in store (save your receipt for rebate) or online (save your original packing slip.)

Here are some online prices:

Single 1000 MPR Filter $11.95 + s/h
Single 1200 MPR Filter $13.88 from Walmart.com

*BEST PRICE PER FILTER* Filtrete 4-pack Micro Allergen Reduction Filter $39.96
from amazon.com