I thought about the icky factor. I searched this sub-board and saw other people list masks and machines with masks. This mask is also very easy to clean thoroughly. I don't know... It's a $100+ mask for $10 plus shipping. If it's not appropriate, a moderator can delete this thread. The mask would sell on eBay for $40 is a second.
As far as replacement goes, I've never had an insurance company that replaces a mask every month. It depends on the mask but some can be worn much longer. Additionally, this one has a replaceable cushion.
Rob