Billy Joel has added a 10th show to his open-ended run at Madison Square Garden.Tickets for Joel’s show on Oct. 2 are $64.50-$124.50 and go on sale at 10 a.m. Friday through Ticketmaster (800-745-3000, ticketmaster.com). Pre-sale tickets are available to Citi cardholders through the company’s Citi Private Pass program starting today through 10 p.m. Thursday.Joel’s shows are already sold out through September, according to Madison Square Garden. The next show in the run is March 21.