Cheapest way to order a lot of USB-RS485

[chackl]

Hello!

I hob somebody got any answer for me - This is the first time that i'm working on a Software that need Hardware.

This Hardware are those simple FTDI Chips for DMX - but if you buy such a device that is named like DMX or openDMX you'll pay 20$ more on the marked - but there are cheaper ones that are working (Tested):

http://www.aliexpress.com/item/10PCS-US ... 18691.html

So is there any other wesite or any tip that you may have for me befor i order the first ones? Prices are changing everytime - so is there any tip you could give me belonging to prices and when to buy?

Regards
C.Hackl