IBM / Lenovo 60Y3275 - Bluetooth BDC-3.0 Module / Daughter Board for Thinkpad E420, E520, T520, T520i, W520, X220, X220i Sale $29.00 Retail $79.00
Intel I5-520UM - 1.06Ghz 2.5GT/s 3MB BGA1288 Intel Core i5-520UM Dual Core CPU Processor Sale $179.00 Retail $299.00
Intel I5-520M - 2.4Ghz 2.5GT/s 3MB PGA988 Intel Core i5-520M Dual Core CPU Processor Sale $32.00 Retail $99.00