Willem Programmer, I paid like 10 bucks plus shipping in 2006 from some dildo on ebay (chinese seller). The parts are dirt ass cheap as it’s just a cap, a resistor, jumper and 28 pin eprom socket. A ZIF socket is good to have, but not necessary.
Chips are cheap, I can’t remember exact cost, but I still have about 50 chips sitting here at my house. I think I have enough sockets and other parts to chip about 25 ECU’s.