To me, that cable looks very very thin and the strain relief looks rather cheap. I'm often careful with cables that have a braided pattern on them as the material is often thick but the wires inside are often really thin and poor quality.
I found the stock cable to knot easily, but it was very flexible. But did feel on the cheep side. But I'm certain that this ebay listed cable will feel worse than that.
https://www.amazon.co.uk/AKG-TA3F-V...qid=1540504757&sr=8-4&keywords=akg+k702+cable
I use this as a 1m cable with my mk3 k550s. There are many length options. Can even get a 0.5 or 0.75m cable. Or for a bit less you can buy the exact cable, mini XLR socket and 3.5mm plug separately and wire it up yourself (not easy unless you often do this stuff!)
This cable is very thick and robust though. This cable brand often makes this sort of cable to go on tours, just uses different plugs. Not as flexible as some but feels really well made. I didn't get it for a sound upgrade. Just wanted something that was made better and not 3m long.