I don't think any value.
Firstly, it's not even the right name, as it's Sri Lanka, not Lanka.
Secondly, looking at Namebio, even when the country is spelt correctly, prices for .tours are only low xxx. Uk.tours sold for 160 bucks.
BIN prices mean nothing. I could list myterribledomainisterrible.com for a million dollars, but it doesn't mean it's worth that much.