I use this calculator from Kaiser =
http://kff.org/interactive/subsidy-calculator/
For a single person of 27 years old, with $25K salary, non smoker, no dependent and the results for the three states around my area for silver plan are:
Texas, Lousiana, and Arkansas = $1,729 per year (after subsidize and credit from government) or $144.08 per month. The calculator also stated about the $1,729 and I quote ""which equals 6.92% of your household income and covers 56% of the overall premium".
About the same ballpark figure as the NPR/Nightly Business Report number ($125 per month) as I said previously.
None of that less than $100 per month as you claimed.
On a side note, from CNN:
So no penalty for them ILLEGALS and they don't have to pay for insurance yet if they get sick, the hospitals must treat them? <mind blows>