American Axle & Manufacturing Holdings Inc. has again put up its Cheektowaga plant at the Walden Avenue facility for sale for an asking price is $5.5 million. American Axle has retained Robert Schell from Pyramid Brokerage Co. to search for a buyer. Schell is working with Collier's International to market the complex. "It's really a first-class manufacturing space," Schell said. "It's got everything a manufacturer could want in a plant."