Buying a Former Rental Class C. How many of us out there?

While checking the interior of my 2015 Majestic 28a last week I heard beeping and discovered it was my dual carbon monoxide / propane gas alarm. Upon closer inspection, the flashing lights indicated the unit had reached the end of its useful life and needed replacing. An inscription on the face plate also directed the device be replaced after 5 years of service. Just an FYI for other former rental owners to be aware. Cost to replace is appproximately $75. I bought mine online through Camping World with a $15 coupon.