Two - Terrapin X Wing S/C bearings - $40, shipped anywhere. " Buy it now" on eBay
http://cgi.ebay.com/2-Terrapin-X-Wing-S-C-Competition-YoYo-Bearings-HO-HO_W0QQitemZ330385353646QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item4cec806bae