Which laptop listed here is newer?

[riveraskip]

I bought 10 laptops at an auction and need to know which one is the newest. They are:
Compaq Presario CQ50
S/N: 2CE835SQY6

2 - Compaq 610
S/N:
CNU0101H1V
CNU0101KWM

2 - Compaq Presario R3000
S/N:
CND40703S9
CND402040N

Compaq Presario 700
S/N: 9X27KVC220DW

Toshiba Satellite L305
S/N: X8591801Q

Toshiba Satellite 1115
S/N: Y2355825K

Toshiba Satellite 5105
S/N: 82013236PU

HP Compaq nc6400
S/N: CND7210DHX

Any help at all would be good.

 

[hang-the-9]

Look up the serial numbers on the support site for warranty, often they will give you a build date or at least warranty expired date and you can subtract 3 years from there, although some laptops may have a shorter warranty period if they were not corporate models. Or look on the laptop stickers there may be a date there for the build date. Or just look up your models and see when the first review of them was.