I had the C2300 and it is built like a tank. I bought it used on AG with less than 200 hours on it. Never an issue.
If you do buy used, ensure those plastic feet are in place in the bottom of the inside carton and put some foam under the front panel/glass to preculde any shipping damage. The 2300's outer and inner box weigh something like 20 lbs and is substantial but doing the above will ensure if you do buy used it will get to you without any damage.
I also switched out the two linestage tubes as the standard Chinese tubes that Mac uses aren't the best sounding in my opinion.
Very flexible and nice sounding preamp.
If you do buy used, ensure those plastic feet are in place in the bottom of the inside carton and put some foam under the front panel/glass to preculde any shipping damage. The 2300's outer and inner box weigh something like 20 lbs and is substantial but doing the above will ensure if you do buy used it will get to you without any damage.
I also switched out the two linestage tubes as the standard Chinese tubes that Mac uses aren't the best sounding in my opinion.
Very flexible and nice sounding preamp.