I have quantity 6 THK 15MM linear rails with one SSR15 slide bearing block. The rail are 18 inches long. These are used and could use a cleaning. They all slide smoothly with no tight spots or chatter. I value these at 35.00 each ALSO I have quantity 4 THK 12MM linear rail assemblies mounted on a aluminum plate with 4 RSR12ZM slide bearing blocks on 2 rails. the rails are 1.2 inches apart and are 20.3 inches long. The aluminum plate is 21.5 x 3.2 wide These are used off of working equipment. They all slide smoothly with no tight spots or chatter. I value these at 85.00 ea I will not be using these but im sure you guys may have a use for them. What do you have sitting around you want to trade. Send me a PM on what you have If you need more pictures or information let me know. Joe