2448 is for A/C option, has a date code of 2D5 for April 5th. The 2439 has a date code of 2A25 for January 25th for non A/C . Prices are 125.00 and shipping 17.50 Priority shipping with full insurance. I do take Paypal as sales, Joe 602-298-7090 Rebuildable cores, not tested but do spin freely.