There is a $3.00 rebate available for Filtrete Air Cleaning Filters that are rated 1000 MPR or higher. Right now you can pick them up (depending on your size) for around $10.97 each at Home Depot. Send in for your $3.00 rebate to get them for only $7.97.
I love when I can save a few dollars on things that I hate spending money on. Like air filters. Who wants to buy air filters. Not me. I know it’s a necessity but I just hate plunking down $10 for it. So every savings helps.