I started out with a 400 dollar russian 12...it worked, still have it, it still works.
here's my take on cheap O/U's. The mfg. sells it and makes money. The importer buys and then sells it and makes money. Then the box store buys it and sells and makes money. So, at best your 400 dollar gun really started at maybe 150...that is not inexpensive, it's cheap. Cheap in price and in quality.
I know, not every one can afford to spend 2 grand on a shotgun. I also know that no one should waste 400 on a 150 dollar gun....and it is a 150 dollar gun....try to sell it for 400! You would be better served to spend the 400 on a Remington 870 or 1100....lots of 870's out there...you can find 1100's for 400 bucks if you look. Both will hit anything in range, can easily be repaired, and will give you at least 1 extra shot vs. the 2 in your cheap O/U. When you make up your mind to get a nice gun, you can sell them and get all or most of your money back.
One other thing no one has mentioned...my 2000 dollar Beretta handles 10 times better that my 400 dollar Russian. It simply works better, feels better, and yes it looks better too. So in fact, I should have bought a 4000 dollar gun, it would have been worth it!
I want you to remember this....IF you get sucked into the clay shooting games (and it is very easy to do)....the gun will be the cheapest part of the deal....even if you start out with a 10,000 dollar Kolar! In the end, you spend much, much more on shells and targets. There really is no such thing as a cheap O/U...it costs a lot to feed one!