I have a son turning 26 in July, my thought is to encourage him to get temporary coverage to Dec. 31. He will be eligible to sign up for subsidized coverage on the new exchange in the fall, even if a pre-existing condition were to appear before then.
I just checked the cost with a reputable non-profit insurance company in my state, 150 days coverage with $5000 deductible costs just $231 total for the entire period.
Cobra may be extremely over-priced for a young healthy person. I think when my daughter was eligible the cost was at least 3 times the cost of getting her own individual coverage.
press on, regardless - John C. Bogle