Tina,

If you already have a barcode font installed on your system and the
barcodes are created/printed correctly with that font, then you can use
pretty much any scanner to read those barcodes.

When purchasing the scanner, just verify it reads they type of barcode
you are creating. If you use Code 39 or Code 128 barcodes, then 99.9%
of scanners out there will scan that.

Alek Szymanski
http://www.barcodewiz.com