Meet the HAVYK Slider: a handy tool that works on nearly any type of surface and lets you move from forward, backward, and side-to-side to work on your core. These come in pairs and weigh a total of 13 lbs. They are made using CNC laser-cut A36 steel and stainless steel components.
Each slider has a max load capacity of 150lb. Sets you back under $150 at this time.