While Ms Shecantbeserious & Friends continue flailing around with the train-wreck of a website, and keep extending deadlines like there's no tomorrow [ed: heh], the folks at PricewaterhouseCoopers (PwC) have produced an interactive map of actual premiums. As they note in email:
"In just over half of states, that newly insured [27 year old] will pay between $195 and $250 a month for the second-lowest cost silver plan. In five states, that person will pay more than $320 a month ... This newly insured [50 year old] will pay more for coverage, typically about 70% more than the 27-year-old."
So, sticker shock at both ends. In any case, it's interesting to click around to see the variation in premiums from place to place, and age to age: