Looking for Budget Cisco handset supplier

Hi There, We are into local hosted PBX market in NZ and Aus at the moment. I am looking for a supplier who deals with lots ex-corporate cisco phones. Anything with cisco 79XX series good for us. We set Cisco phones with Asterisk. Our budget will be depends on the feature available on the phone but shouldn't go higher then $50 including power supply. Time to time we need bulk supply too.. instead of searching across the web, I thought this would be better idea of finding a reliable supplier. Looking forward to hear back from you