$300+? Heavy on the + in my observations. I see 999s going for $500-$600 on a regular basis. I like the 999 and think it's a cool revolver, but the asking prices seem way high for the medium quality of the guns. For that money a deluxe target grade Colt or S&W is easily within reach. I think a decent 999 is a $250 gun but sellers want at least twice that much.
I got this at a show about 2 years ago for $150. Older (1941) and has some finish issues but works great and is a lot of fun.