$500 - I am selling a Cuetrack Stroke Trainer in amazing condition, with its original box and paperwork. These went out of production about 9 years ago and are almost impossible to find, in any condition. It is a fantastic training aid; you slip the tube over your cue and then cue within the prongs (see pictures). This device forces you to stroke in a perfectly straight line, and as a result you will develop the muscle memory to cue perfectly straight.