Newegg.com has the Low Cost Laptop Memory Upgrade Deal for $23.99 + Free Shipping.

This is the best laptop memory upgrade available for anyone who is looking to add more RAM to their laptop.
We recommend to have at least 4GB of RAM on the latest laptops in order to have a good computer experience.

About:

• This laptop RAM a 204-Pin, SO-DIMM type at DDR3, 1600 speed.
• G. Skill offers a Lifetime limited parts and labor warranty on this RAM.

Guide to Installing Laptop RAM:
Adding RAM is easy to do for even the inexperienced computer upgrader.
Always remove your battery and AC adapter before working on your laptop.

Computermemoryupgrade.net has a Picture Tutorial on how to install RAM in a laptop.

This laptop memory upgrade will work on most recent laptops in the past couple of years.
Please double check your laptop's manual or specifications to see if this is the RAM for your laptop.
Take extra safety precautions before installing your laptop memory upgrade or
have someone with experience help.

Reviews:

Newegg.com reviewers have given this an average score of 4.9 out of 5.