Kinda cool, I need to know what is in shortage here !
Here's a list of upgrades I got for free over the years :
33.6 generic crappy modem replaced by Supra 33.6 Voice modem.
1.2 GB Maxtor HD replaced by 1.7 GB Maxtor.
6x Mistumi CD-ROM replaced by 8x Acer.
Cyrix
PR-150 CPU replaced by
PR-166.
I once bought the 300 MHz K6-2 CPU in a store's demo machine and I discovered back at home that it was a 333.
My friend got the best upgrade after his basement was flooded :
K6-III 400, 128 MB, V3, 13 GB HD replaced by Athlon XP 1600, 1 GB RAM, V5, 60 GB HD. All this for the ridiculous price of 60 $.