Hi all,
My kitchen cabinets are installed using the Blum system. The mechanism is very smooth and sturdy; you can pull out the drawers and sit on it without damaging the runners.
Actually, there are quite many different Blum devices. As mentioned, there are the Blum hinges, and if you also want to install the Blumotion for doors, the mechanism cost about $3.60 per piece. Besides that, you may also need to get the adapter plate, which cost about $0.30 per piece and about $0.62 per twin adapter plate.
I also got the Tandembox drawers, which cost between $40-$60 per piece, depending on the design (double gallery or boxside). You will also need to get the runners for the drawers, which cost about $40 per set. All in, it costs about $100+ for a drawer.
Of course, all above prices are quoted direct from Blum, and does not include installation. Installation will depend on your contractor. Yes, it is true that you need special equipment for installation, and not all contractors can do it properly, hence they may charge a premium. I was charged about $400 for installation, in addition to my foot run of cabinets