If you want a good double shotgun plan on spending a minimum of $1,000 or look for something used that would have cost that much new. Even at that, a $1,000 semi auto is a much better gun than a $1,000 double. A $300 pump is going to be much, much better in the long run than a double costing twice as much.
Good advice, except I would opt to change the dollar amounts - $3,000 to $5,000 new is a decently made, balanced SxS; used amounts will run $1,000 and up.
CZ's are still Turkish, and while getting somewhat better they aren't really there yet - the main issues seem to still be the triggers and barrel regulation. I'm not saying 100% are trash; rather it is a hit and miss proposition