Looking for in-line skates at a price that's not out of line? How about a perfectly good mountain bike that won't set you back the cost of a used car? The folks at Sports Plus, on fashionable South Gaylord Street near Washington Park, can help burn calories without burning salaries. You can even pick up a lacrosse stick -- or a Big Bertha driver that hasn't been tossed into the pond even once. For Denver's physically active set (and who isn't?), here is a useful alternative to outlandish new-ski prices and $200 baseball gloves. Management will also take your name and number and call when the store gets exactly the used item you want.