Hi there,

For $600-$700, you can get yourself a pretty solid guitar. If you're looking for an acoustic, I highly recommend the Taylor Academy Series.

https://www.guitarcenter.com/Taylor/Academy-10E-Dreadnought-Acoustic-Electric-Guitar-Natural-1500000039111.gc?pfm=item_page.rrt1|ClickCP

They're well-made Taylor guitars, no-fuss, just the basics and they're great bang for the buck! Check it out.

I personally play a Breedlove guitar, and they're pretty solid too! https://breedlovemusic.com/acoustic-guitars/dread