Did you report this to ebay and to your credit card company? People have tried to swindle me a couple times on eBay over the decades. I just report them to eBay and to my credit card company or to PayPal and it's all taken care of by them.I bought them on eBay and didn't ask if they were DOT. The seller said they were "in hydro" and I saw vis stickers on them. When they arrived I found that they were NOT in hydro, nor ever had been as they were non-dot and required special European valves (no burst disk). Shame as I was looking forward to having steel oxygen/dil bottles without spending 600+ on the pair