there must be an 1000 posts regarding the surplus electronics vendors ... dont forget bgmicro.com and mpja.com
also keep in mind, many of these items while new, they aren't newly made, and the reason they're being sold surplus is they've been replaced by faster / better / cheaper components ... example: mosfet transistors ... the surplus fets are real dogs in terms of Rds(on) and other specs, compared to what you can pickup from digi-key, and the newly made parts are most often cheaper too.