DFP maybe overpriced, but those Act Labs shifters and pedals are much much cheaper than ordering from the US. For example Act Labs pedals shipped to Finland would be total of ~200€ from the US and from UKFormula only ~140€. You have to pay taxes and toll fees when ordering from outside of EU. It's a specialty shop and you can't get those stuff from anywhere else in Europe.
Sure, you may get stuff cheaper from ebay or something, but used != new and you can't compare them like that.
You need to do some work to your joystick if it hasn´t got Force Feedback to stay at the gears. The one I said (wich I use) have FF and the only thing I had to do was adding a knob, the program FFShifter does the rest. With a second pedal set is fantastic