I was wrong. The package of Manhattan Island has 4 tubers! That's 4 sets of tubers for $9.98 so there easily could be more that sprout and some, still in the bag, have sprouted. If anyone is still thinking about trying to grow dahlias, it's a great buy!
We went to HD to check out trellises on Friday. By then they had rows and rows (unbelievable in 24 hours time) of bagged plants as well as fruits like blueberries, blackberries, grapes, and much more.