This is hands down the best room air purifier you can buy. There are three filters that get replaced periodically. Following is the life left on each (in hours):
1. 2,845 (replaced ~2 months ago)
2. 7,000 (brand new)
3. 4,534 (original filter)
Cost $900 new. My price includes shipping in the continental US, but does not include paypal fees. The unit itself is in like new condition. Only...