I bought an Acecare DOT 9L bottle (only) from Amazon for $450 to the door. Added a Jubilee valve from Best Fittings for $100 that had a Wika gauge, and it's a great setup for $550. I only saved $1-150 from what other tanks were going for at the time, but I got the valve and gauges I wanted. The real savings on the tanks is with the non DOT rated version, but you need a compressor. At the time I didn't have one, and I wanted a travel tank that I could fill at a shop if I was on the road. There are additional savings to be had ordering direct from China or through E-bay, but I wanted Amazon backing the tank and pushing the pace on delivery. A quality valve is important to me and the Acecare valves are not that. Overall, I am very happy with this tank set up, and I used the savings for important stuff like whiskey and pellets.