i saw littleton co. selling $1.00 bills as"liars poker" bills. bills with 5 of the same number (6's) in you case, were selling for $10.00 for six bills. bills with seven of the same number were selling for $12.00 for six bills. so for liars poker, they could have a premium value. probably if you used it to play liars poker, you could parlay it into quite a valuable bill.