These we used for less than a week on a demo unit. Most are like new. One or two may have marks left when screws were removed. Priced > half off retail.
http://www.ultibots.com/C-Beam-end-mount-lightly-used
Thanks for looking - Brad
http://www.ultibots.com/C-Beam-end-mount-lightly-used
Thanks for looking - Brad