Price for website integration is €249 and I think that can be reduced or maybe you could add several tier packages with lower prices.
IMO, it's acceptable price for premium support/service since the base product/support is totally free. Although i wonder how many people would pay for 249 EUR.
I guess not many. In my experience, website owners will most often opt for free solutions, if they meet their requirements, or if their website is large enough, they will get a custom solution from companies that provide enterprise level solutions. Usually this way they get a solution tailored to their specific needs, and also get other services along the way.