What is a good pit bike that i can get around $700?

I am new to pit bikes, but i do got experience with dirtbikes. I've own a crf80 and i loved it but sadly i had to move into a apartment and i had to to sell it. I have moved out into a neighborhood that has a place to ride but i don't got alot of money so i was looking at pit bikes. I am 13 year old and am 5,4 and wiegh around 110 lbs. I want either a 110cc or 125cc. Thanks for any suggestions.