There are lots of places you can buy bulk flash drives including some of the main computer manufacturers such as misco etc, however one of the cheapest options is to buy from a promotional company who specialise in the products! There is a UK based company who supply bulk flash drives who are http://www.usbflash.co.uk they can also get them printed and customised with company logos free of charge!
alpha-usb.com is one of the best sources in USA. First of all they sell brand new chips, unlike the ones that you can get on eBay. And they are wholesalers, so their price is very reasonable. I'm a photographer and this company is my vendor.
I have been with Alpha-USB.com for two years now. Placed 5 orders, the latest was on Feb 21st and product is already in my hands. Everything is perfect, good price and exceptional service. Highly recommended vendor!
I wanted to thank vipleague and Michael for leaving a review about our company on this page. Customer satisfaction is our main priority. If you are interested in purchasing our product, feel free to send us a request. We work with every customer individually.