Is it safe to purchase health insurance on the phone or internet?

I recently became self employed. I don't presently carry health insurance, however I have preexisting health issues. There are many offers that sound too good to be true my concern is they want money over the phone or internet. Their offer was $129---$179 mtly to included doctors visits medications no deductible but a copay for doctors visit and medications. Could this be legit? Who do I call to check how legit?