Mid School BMX bikes are coming of age and finding their value compared to Old School BMX, which is astronomical these days. Your Mosh is a nice and clean example, although lower end / entry level. The crank is one give away, as well as the 'Main tubes chrome moly' decal.
High end Mid School BMX were all cro-mo as it was in the 80's with the Old School era. Even so, worthy of collecting and probably a few hundred bucks due to its good condition.
Mosh is a division of Giant and was started in 1996. Smack dab in the Mid School era. Check out bmxmuseum.com for a master class in all things BMX.