How to ship Hickey saddle tanks/used gas tank?

[mrtoni]

After a long search, I finally found a set of hickey gas tanks. They are completely rusted thru on bottoms but still have a gas odor. I’ve had one shipped ups ground a few years ago but seller is understandably nervous about shipping hazmat or possible flammable gas tank. I know a member shipped a set with fastenol. Any good ideas? I checked craigslist Denver to Reno ride share as in the back of a pickup would be best. Matt