My new gym calls for a 40m rope, and I'm selling this cheap ($50 with shipping) considering that it's used.

This is a thick, dynamic gym cord built to last. It's from their marathon series, I think, and it's pretty robust, like 10.3mm. I've had it for a few years, so it has been fallen on, but it's in great shape. No flat spots or rough spots in the sheath.