For sale is a used Alpha Revo 4000 Tennis racquet stringing machine in great conditon. I would estimate the machine has been used for less than 100 racquets, and the tension head for about ten. Cosmetically it is in very nice condition. You have have to look closely to find any scratches or defects in the paint. There is a 0.25 inch by 0.125 inch scrape in the silver anodyzing on the string gripper, and another much smaller scratch nearby, but that is about it. Other than the small scrape in the silver anodyzing, it is close to "new" looking. Mechanically, this stringer is in excellent condition. I have taken apart and adjusted the base clamps so they are working exactly right and are buttery smooth in operation. My personal stringer is also an Alpha Revo 4000 and I am somewhat mechanically inclined so I may know somewhat more than the average Revo owner/seller. The right buyer will be very happy with this tennis racquet stringing machine. It is strongly made and there is not much to go wrong. I bought my first racquet stringer 34 years ago for $300. This Alpha Revo 4000 is ten times better. This stringer comes with two Eagnas PN-1012 three tooth string clamps, NOT the original Alpha five tooth clamps. These Eagnas clamps have been used for about fifty string jobs and work great. They are easy to use and are easy to adjust. They are the latest model. Alpha is just now coming out with three tooth clamps on their latest machines. The posts on these Eagnas clamps are very slightly smaller in diameter than Alpha clamps. At first impression this would seem to introduce more "drawback" into the string job, but in practice it doesn't at all or so little as to be negligible. Proper stringing technique for every stringer is to lightly pull back on the string clamp away from the tension head as the string is being clamped, thus eliminating slop in the post/hossel interface (there being no deformation in metal against metal.) In testing I can discern no difference in drawback between Eagnas and Alpha clamps on this machine. I will gladly demonstrate to the prospective buyer. Regardless, good stringing is all about consistency, and for sure a good stringer can get that with this fine quality setup. This stringing machine does not come with a manual. It should be easy enough to learn everything about the machine and stringing from Youtube and the Talktennis stringer forum. The Alpha Revo 4000 is possibly the most popular quality stringing machine on the market. It will also string racquetball and badminton racquets, and the sale includes two metal Alpha badminton flying string clamps. Price is $380 cash firm. I have no doubt this machine could be used for many years and then resold for this price or very nearly. It is my observation that quality machines such as this hold their value after initial depreciation from new. Pickup would be near Marble Falls, Texas, about an hour west of Austin or 70 miles north of San Antonio. Shipping in the continental USA would be $40.