C.M.
I think it's one of those things where your daughter should go into a music store and try some guitars out. Even if she's never played before, she can sit with the guitar and see if the shape fits her body and if it's comfortable. She can see if she likes the neck. She can strum a few strings and see if she likes the sound. Guitars have personalities, and I think it's like Harry Potter picking out the wand. The guitar picks YOU!
She will know, after trying out a few guitars, what feels good.
I wouldn't pick up a pawn shop guitar unless you know a lot about guitars. A music store is your best bet. They can also point you to the best buy for your money. $200 is a good start, you should be able to get a very nice starter guitar for $200. They can also advise you on the best strings.
To go with the guitar, you will need a strap, some picks and a tuner. You also need to think about where you are going to store it. Are you going to buy a case or get a guitar stand?
So be prepared to either include them in your $200 price or spend a little more. The good thing about music stores around the holidays is they often throw in a lot of "freebies" or they put together good "starter" packages.
When my daughter wanted to start guitar we were able to get her a starter package for $150. It included an electric guitar, a small amp, the cord, a tuner, some picks, a guitar stand, headphones and a DVD on getting started playing. The package had pretty much everything she needed to get started. I know they make acoustic guitar starter packages too, and I think you can get everything for about $130-150. There are several brands, so she has a few to choose from.
A starter guitar isn't going to be as nice, but if she really likes guitar then she can save up for a really nice one. My first bass was a starter package and then I saved up for a $1000 one. I still have my starter and I still play it and record with it. My daughter just got a nice electric guitar, and she still plays her starter.
Good luck and have fun!