I'm not saying there's a problem with the site contents because i can't really say if there is since the website is in german (i think) and google traduction doesn't translate acuratly everything.
What i'm saying is that the website is not attractive ! the colors are bad , the way you are presenting what you're offering won't attract costumers and it's up to date with the design of websites all over the world.
This is just my opinion so just ignore it if you don't agree ^^