I did my research into it matey, i know what you mean !
The seeker pod, holds 3 gauges and fits the dash nicely costs approx £300 IIRC (Touge can get this, maybe SumoPower can too)
Then there's the gauges, I found a nice looking set of 3 stepper gauges for £150 ish
Black background & fascia, Blue backing LED & red lit needles
Obviously you could use the generic singular pods for a couple £ each for nice looking ones
I hope this (little) bit of info ^ is of some use
The cost just couldn't be justified in the end though !
The set-up i've got takes 30 seconds to get turned on and working
-Plug in OBDII
The advantage with the OBDII app is the fact that i cant change what info i want shown at any time and swap the gauges to show other info!
Obviously the ability to use in any other car is useful too!