How much am I going to pay for a good meal in a nice restaurant in Berlin, when I win this game?

I love apfelstruddel, lambchops and sausages.

You should find that for about EUR 10-15. Lambchops are not really German cousine but you'll find them. I prefer them from the greek restaurants.
For good German food stick to pork (if your religions allows you), that's what we eat all the time and it is good and safe in Germany.
In Berlin, you've just gotta try the local specialty currywurst (fried sausage with ketchup-curry sauce). You won't find it in too many restaurants but in all the small eateries in malls and on the streets (so called "Imbiss").
Guten Appetit!

last time i went,prices were about what you pay in usa at a nice place

You will pay around 15 - 20 Euro's for a good sized meal. Try Schnitzel, Jager (Hunter) sauce, made with mushrooms and cream or a Zigeuner (Gypsy) sauce made with tomatoes and pepers, and Bratkartoffln (fried potatoes) or if you are daring try a wild meat dish

You pay for good food in Germany so round 20-25 Euro. For Apfelstrudel and cup coffee 6 Euro.

eat a doener , they are yummy