For sale thru Ebay is this great mattebox, starting bid is $115. It is in excellent like new condition, because I may have used it twice. I sold the camera this was to go with so don't need anymore. Kamerar products are really well built. comes with original box, allen wrench, and of course removable side flags. You can see more about this product at kamerar.com/products/matte-box-max-1-with-donut. This sells new for $195
You can see all the info and photos here:
Kamerar Max 1 Matte Box with Donut | eBay
You can see all the info and photos here: