The cheapest ST8130 that is suitable for road use is £970 delivered. This has speedo, rpm, oil pressure, water temp, battery voltage, fuel level, odometer and trip and for an extra £38, air temp.

To have fuel pressure (like on mine) is an extra £117.50, but then you can't have air temp with this.

Please also be aware that the ST8100, ST8100M, ST8110, ST8120, ST8150 are NOT ROAD LEGAL! You will need a friendly MOT station to get it through, as it does not have an odometer of any sort (a legal requirement).

Hope this helps.