that price is not at all unreasonable but last year I wanted a post hole digger and saw 1(Danuser 12in) for 250 on CL and he took 200. when I got home with it I looked again and saw another 1 (Danuser 9in) for 225. I almost bought it too but decided I didn't need to get crazy. I sent the serial number to Danuser and the Danuser family member that runs the company now (I forget his name at this time) actually responded by sending me information about when it was made and where it a was sold along with the manual.
You can't beat a Danuser. it still works great. you can get any parts you might need to keep it running great. you won't regret getting it. new tip and cutting edge are easy to replace if you want it to cut like new if the ones on yours are worn out.