Original owner, in excellent condition, lightly used. Light weight & easy to tow. Selling due to kids busy with sports, so no free time to travel. Full service check just completed by Holland Motor Homes in San Marcos.

Specifications
Maximum Sleeping Capacity
11
Number Of Slideouts
3
Length (ft-in / m)
36' 10\' / 11.2
Interior Height (in / mm)
78 / 1981.2
Base Weight (lbs / kg)
6590 / 2989.2
Carrying Capacity (lbs / kg)
1410 / 639.6
Hitch Weight (lbs / kg)
690 / 313
Number Of Axles
2
Air Conditioning (BTUs)
13500
Heater (BTUs)
N/A

Holding Tanks
Fresh Water Capacity (gal / L)
30 / 113.6
Gray Water Capacity (gal / L)
60 / 227.1
Black Water Capacity (gal / L)
30 / 113.6
Propane Capacity (gal / lbs)
9.4 / 40
Water Heater Tank (gal / L)
6 / 22.7

Link attached with specs

https://www.nadaguides.com/RVs/2016/Keystone-RV/M-3320-BH/6546848/Specs