.li is the ccTLD(Internet country code top-level domain) for Liechtenstein. I first saw this domain is at iisp.com. The price is pretty high(about $40/year) and made me give up.
It so happened that this domain is also sold at namecheap with 14.99$/year. According to the significance of this domain to me and such a low price, I bought it with no second thought.
BTW, I also set up a custom email with this domain, email@example.com. But my old main email account seems to need a long time to fade out.