Lenovo ThinkPlus USB Fingerprint Reader - Fingerprint reader - USB -FRU: 89P8385 $56
External 10-Key Numeric Keypad Option $14.5
Belkin USB to serial cable $19
IBM Thinkpad Numeric Pad - Black - TP 310, 315, 360, 365X/XD, 560, 700, 701, 720, 730, 755, 760, 765, 770 - FRU 95F5741 $19
SmartCard Reader USB ST-1000UB - REFURB 26K4000 $46
USB PDA Adapter USBA Connector to DB9M, IBM#73P2487 $23.5
Targus Wireless Keypad & Mouse Combo $67.2
USB Numeric Keypad $58.8