Used ones are all over the place----CHEAP! Due to Garmin coming out with theirs. Pick and choose---CHEAP!!!
That's the fact. Lots of very high quality chronos on the used market now because their owners bought Garmins.
If money is tight - buy one of those. If not - buy a Garmin (or be first in line for Lab Radar, et. al.'s response to the Garmin).
I wouldn't buy anything that attaches to the barrel. Regardless of its accuracy it's going to affect your groups and prevent doing velocity measurements and valid load work at the same time.
Best of luck,
Rex
