The serial number of my (circulated) bill is K 00141753 * and I was wondering... Is it worth anything if it has been circulated? I have seen some more worn 1976 $2 bills on E-bay, selling well. But I cannot be sure about price, can anyone help?

Remember, when the $2 bill was reissued in 1976, millions were kept by collectors and everyone else too. Some were taken to post offices and stamps were affixed and canceled on the date of issue. You'd be lucky to get $4 for it. There's no reason to think it will appreciate, ever.