Since I've decided that losing weight and getting in shape is priority #1, I've set my budget at $1100. Hopefully that can get me everything I need.
I assume that in my price range used is the best way to go.
Actually, there a LOT of very good high quality bikes that you can get BRAND NEW from your LBS way below that price point. You'd even have money left over for extra gear like, helmet, gloves, etc. Like kstephens pointed out, as a newbie, its best if you went to your LBS and got fitted for the right bike. They would also be able to answer all of your questions and do any adjustments you need. With a used bike the owner may or may not know anything about the bike and definitely wouldn't be able to give you the customer service you need and deserve. With your LBS you become a customer (hopefully) for life.
MrsN