You state you have to downgrade.
What are you running currently in 9mm, and what is the need to downgrade?
If its because you need cash selling a firearm usually won't net you what you paid for it barring you got a good deal on it used originally.
And in the $200-300 price range there isn't a great choice for a new firearm, especially when you'll likely need to buy another mag or three at $20-40 a pop.
Your likely better off hanging on to what you've got or scrounging around at pawn shops and the like for a good deal on a used 9mm.
At $250 the sccy's are cheap but they are reported to have some teething issues. Kel-tec is kel-tec some run great others are on the barnstorming factory tour....
$300 and less has used ruger P-series or if your lucky an SR9 or 3rd gen Smith and Wesson autos.