Yes, but the company that assembles the (eg., in my case) an oven is 30minutes away from my home, and the company that makes the railings for the trays is 5 min

Yes, but the company that assembles the (eg., in my case) an oven is 30minutes away from my home, and the company that makes the railings for the trays is 5 minutes away, but the railing mechanism still costs 100eur. Lets be real here, the companies want you to buy a new product, and expensive parts are just one of the parts of planned obsolescence.