Runje in Eastern Adoulin will give you a free one if you purchase more than 100 with bayld. So if you are buying multiple hundreds, break it up into purchases of 100 to increase your freebies.
In response to Nhi, you get a free one per 100 you cash in. So if you buy 100, you'll get one free, if you buy 200, you'll get two free, etc. So just purchase in multiples of 100 and you're set, no need to do 100 each time.
