A barcode scanner is an essential tool to increase your FBA efficiency. The desktop ones are easy to use and a cinch to install - just plug and play with no software required.
Desktop - Symbol
I bought a (used) Symbol LS2208 when I needed a second barcode scanner, and I highly recommend it.
Desktop - Generic
When I started using FBA I purchased the inexpensive scanner linked below. I found it to work reliably, but does not have the build
quality of a more expensive unit.
Portable - Scanfob 2002
A Scanfob 2002 is an excellent tool for mobile product evaluation. I use mine with Profit Bandit
on an Android.
The best place to purchase one (for both warranty and support) is Serial IO.
I wrote an article that talks more about the Scanfob 2002 / OPN-2002
Note: the Amazon and eBay links on this page are affiliate links, I receive compensation if you click and buy.