back in the '70s, I used to lease tanks for free, and they would help me load them in a borrowed VW Bug. Those were the days. I wonder if those tanks ever made it back to the company, I gave them to the bike shop I worked for. I find it amusing when one of those tanks is up for sale on CL, usually for $$. I don't think anyone buys them though.
My LWS makes me sign a waiver that I transported the tanks and it's not their responsibility. We are one big explosion away from that not being an option. Then we will all be using propane or finding a commercial space to rent. The guy that got tanks before me took his tanks and (literally) threw them in the back of his pickup loose. When he kills himself, that might be the end of improperly transporting tanks, who knows? I suppose I should have mentioned to him that those things can explode and he should wait for the gas to normalize before he uses them, but he probably wouldn't have listened anyway.
My 75 cu ft acetylene tank recently cost $50 to fill.