Of course it is, if you're not taking anything with you. I moved thousands of miles for $0 once, because everything I was taking fit in a suitcase that I already owned, and my flight was paid for by the company I was moving to work for. I'm talking about people who have to move apartments, and possibly families. You aren't doing that for $20.
That's a valid objection to two whole words of my comment. On the flip side, 99% of SF is people who live in homes. Most of those people will have more than a backpack's worth of stuff to move.
Unless you're moving to the bush in Alaska or the desert in Namibia or something, or have some weird medical issue that requires you to bring some large special life-saving item with you for the journey, then you're in the 99% that can survive just fine selling your stuff where you are and then buying necessities when you arrive. I said doable, not that you could do it while keeping grandma's heirloom piano.
Well, I sold almost everything I had before the move. It was an interesting experience. I had 4 bags that I could afford to bring along, and at least twice more of the amount of things that I wanted to keep.
