Newmar Mountain Aire 4551

Still in production — a used 2023 would run roughly $639,000.

A missing row means the maker never published that figure — unknown, not zero.

• 1× king bed(Permanent)—
• 1× convertible dinette(Convertible)—
• 1× sofa sleeper(Convertible)—

Newmar (Better tier): Newmar Mountain Aire

• 2019Introduced
• 2020Grey capacity 65 to 80 gal, black 45 to 60 gal
• 2024Engine rating raised from 500 to 525 hp; wheelbase went to 318"+tag then back to 294"+tag
• 2027MSRP $926,036 - the most expensive Mountain Aire

Patient search — weeks of watching, and probably some travel. Why: 8-year production run; still in production; priced at the top of its maker’s range. Estimated from build volume and production span — not a count of live listings.

The flagship 45-foot Mountain Aire, in the lineup continuously since 2019 - bath and a half, tag axle, the full-size coach.