The original poster wants to buy it. So far so good. Entering price negotiations can be worthwhile as long as the seller is not "offended" and withdraws their sales offer. With a company like Vonovia, I rather doubt the latter, but I also can't imagine much willingness to negotiate. They have their calculation tools that determine the "value" of the property. It will be sold for that price or not at all. With luck, a few percent of negotiation room is factored in so that the buyer can record a negotiation success. But I wouldn't have much hope for that. As I said, Vonovia's business model is not trading single-family house plots.