I'm sure you would like to hear your kukri is worth a lot because it is old. There may have been millions of these made and they are all old. These still continue to surface as "new, old stock" from storage across old Persia. You can buy these today for $25 or even less. These often have sentimental value if handed down in a family but for the foreseeable future, they likely aren't going to be worth a lot.
They chop like a bugger and are fun to use. Go attack an unruley hedge in the back yard and have some fun with it.