Michigan Live -- The auditorium walls glowed green and orange. The host on stage held a long skinny mic, and a jovial voice boomed “Come on down ...!” from the ceiling. It wasn’t an episode of CBS game show “The Price is Right,” but it was close.The contestants, in this case, were West Michigan medical-device manufacturers. Each made a seven-minute pitch Wednesday to the 80-plus investors, marketers, lawyers, bankers and other interested parties at the “Product is Right” event at Grand Valley State University’s Pew Campus.