Twice as expensive as I bought it in December 2016 at Amazon Germany with Prime (free shipping).
I live in the southwest of Germany and started tracking in 2/2015 with a “normal” DVB-T (RTL2832U + R820T) stick and the stock antenna. In summer 2015 I switched to a DIY 8 element CoCo antenna which increased the number of positions and flights - up to 120 planes in dump1090. Costs: ~ 14 Euro for the stick, ~ 6 Euro for the antenna (coax-cable, plastic tube, connectors) - which is a total of ~ 20 Euro. In December 2016 I switched to the Pro Stick Plus (paid 19.90 Euro) and now I have up to 150 planes in dump1090.
My conclusion: If someone is interested what’s going on around 150-200 km a good antenna and a cheaper stick is enough. If you want more range and a higher position in the FA statistiscs then think about a Pro Stick or Pro Stick Plus.