Did you try doing a goggle search for "PDA Bulk Lot" or something along those lines?
Doing a real quick search i found this
http://www.liquidation.com
http://cgi.liquidation.com/auction/v...&convertTo=USD
"Variety of PDAs from Palm, Tungsten & More - Over $20, 400 in Retail Value!" basically 102 pdas for $1200
Also found 95 Bluetooth Headsets for $100
I know its gay. But Sometimes on ebay people sell lists on where to buy bulk items.