My guess is that these matchbook calculator things were probably common items at print shops that do clicker pens with company logos on them or walk-a-thon t-shirts. Having one with a Duo logo on it probably isn't very common, but one with a Tanfastic or Guido's Pizza is probably super common.
Plus, the logo is ugly. Plus, it doesn't work. Plus, paper safety matches and calculators didn't exist in the 1890s so...I'm not even sure WTF they were even thinking when they had these made up with Holmes logos on them.
Value: More than a copy of any sports Turbochip, but nowhere near MC league. Not even close. Rarity is one thing, but its nice to have stuff that is actually worth a shit for some other reason as well.
My SERIOUS OFFER: $3, shipped.