Of the three .cc does have some value. I would say ballpark 1 / 100 of the value of the corresponding .com. If the corresponding .com is worth in the 6 or 7 figures then the .cc is worth taking a look at.
Of the "obscure cctlds" the one that does make sense is .tv. The trick there is to find a domain that is
1) A good domain and 2) not priced out of the market as a "premium registration"