What is the value of a h and r worc mass us model 999 22?

15-150 USD or so in poor to fair condition. Depending upon Model and variation* and overall condition, current retail prices for Excellent condition pieces of later/post 1952 production are selling in excess of $400. If you have the original box and papers add another $35 to $50. The demand for these out of production, hinged frame 9 shot .22 rim fire hand guns has risen dramatically over the past 5 or 6 years - and with rising demand comes rising values. There are also several very scarce and/or rare variations of the Sportsman that will command collector interest and sell in the $600 to $1000 range (Model 777 ULTRA Sportsman, Model 196 EUREKA Sportsman and the factory Chromium plated "SILVER SPORTSMAN" are several examples of these high end high collector value pieces.)

*(the Sportsman was in production from 1932 up to 1999 in 3 model series and 5 variations in the 1st Model and up to 7 variations in the 2nd Model)