Best prices on Power systems in Fitness Equipment. Check out BizRate for great deals on Fitness Equipment from Power Systems, Weider and Champion. Use BizRate's latest online shopping features to compare prices for Power systems. Read product specifications, calculate tax and shipping charges, sort your results, and buy Sports Equipment & Outdoor Gear with confidence. Easily narrow your search and find the product that's perfect for you: Power Systems (21140) 7'-10' Adjustable Ultra Slide Board w/ Booties - 8980 System w/ Power Tower & VKR Home Gym.