It is not 'stolen' Cisco gear; Stillwater is a Cisco vendor.  I don't work for Stillwater but my company sells Cisco products (we are one of their Gold Partners) and we deal with Stillwater on a regular basis.

The guy called for the IT Manager. He was calling from Stillwater Communications. He has called in the past and both the purchasing and IT manager have clearly stated that they are not interested. But he keeps calling us.

Cold called, probably by perusing Linked In, looking for target job titles.

This is Brad from Stillwater Communications.  He is very persistent, never give him a phone number that you cannot automatically forward to voicemail.  Working for a Cisco partner, we are not allowed to purchase Cisco gear from Stillwater, as they are not an authorized distributor.  I don't care where they get the gear or how cheap or whatever it is.  I cannot resell their equipment to my customers.  However, Brad doesn't take no for an answer, so now Brad automatically gets dumped to a never listened-to voice mailbox.  He's been calling for well over 2 years now.