Sorry, don't have any to sell, but I too was hoarding these so I could revive my best friend's 110 she used as a child.
Ebay prices are high on old cassettes. Sometimes you get lucky, though, and hopefully someone here has something for you.

However, there are a few companies selling fresh 110 now (even B&W). Look for Fukkatsu and Lomography brands. You could go that route and then re-use the cartridges. Try the Film Photography Project and Ultrafine Online, just to name two.