What price on a car sales pitch ??

My boss at work has asked me if I want to be put on the insurance for business and social use and has also offered me to take home any car off the pitch that I want.

He has told me that I can put my A4 on the pitch and advertise it on our website, He said what ever it goes for I will get all the money and he will take no cut from it.

Now the question is what realistic price should I put it up at???

The car is a 2005 - 05 plate

A4 2.0 TFSi Quattro SE.
Genuine OEM Sat nav
Audi Bluetooth
Genuine Audi Xenons,
Interior lighting pack,
Colour driver information display
Multi function steering wheel
Auto wipers
Auto head lights
Head lamp washers
Rear parking sensors
Front arm rest
Just over 70k with full service history (Mainly Audi)
HPI clear.
3 owners
2 keys
17" alloys in excellent condition
All tyres are in excellent condition.

Any advice would be gratefull.

Don't use Glass Guide, The reason I was asking is my boss suggested £4295 but I think its worth more with the spec it has

Well its on the pitch at £5195, There are no others on auto trader with the same spec or mileage according to our dealer portal site.