Check these out (multiples of 25 boxes) LINK :

9x6x3 - 23 cents per box
9x6x4 - 25 cents per box
9x6x6 - 28 cents per box

+ shipping

Their prices are listed in red so I'm assuming it's some sort of sale that may not last much longer (lots of other sizes in red as well). I personally placed an order on Monday night or Tuesday for 50 9x6x4 and 25 9x6x6 boxes for $29.70 shipped. Shipping isn't cheap, but it's certainly fair due to the weight of the order (they shipped almost instantly though). I was only hit with around $10 shipping for UPS ground, but I live one state away from where it shipped from so ymmv on your charges.

I received the boxes today, and by my calculations have a price of just over 39 cents per box. Quality on them is the same as you receive from DD or Dvd planet orders. Hope a few people find this useful; surely there are some others on here that never have enough boxes once they start selling/trading stuff.

Thanks, Super56K. Like you, I only live one state away from their warehouse/shipping center & I was planning on ordering around 75 boxes. My calculations were almost exactly same as yours: around .39 per box. I have been recycling boxes received from Amazon, DD, DVD Planet, etc., but those boxes seem to have gotten bigger even as DVD box sets get smaller. I've had to scrounge around for the last few orders & put a ton of newspaper & other padding to fill the boxes, so it will be worth it to be able to just grab a box. I discovered the same thing about padded bubble mailers; in the long run, it was cheaper to just buy new ones in bulk than to go through the hassle of re-using older ones (which involved repairing rips, covering writing, removing postage labels and other time-consuming activities). Thanks again for the alert...I'm going to give these guys a try.

ULine is a top notch outfit. I've bought boxes from them before and had nothing but great service and great product.

Phil