The small to mid-sized business can greatly benefit from the secondary market.   With so many companies competing, the consumer is the clear winner.  To differentiate themselves, businesses that sell in the used networking industry offer a mix of unique selling points.  Common now are warranties, free technical assistance and speedy delivery.

Do your research; look for information on industry association websites.  The ASCDI is one of the leading associations for the IT industry.  Educate yourself on the equipment testing procedures that are standard for used networking equipment.  There are good deals to be had; starting here is a good first step.