1981 Koga Miyata...value?

Hello all and wondered if someone could give me a ball park figure as to the value of my stunning 1981 Koga Miyata. In excellent condition !

The specs are as follows -

KOGA MIYATA - 1981

Frame -

58cm Hi Manga double butted steel.

Forks -

531 Fork Blades

Rolling kit -

Rims ( Front and rear) - Welber Super Champions - model 58
Hubs - Campagnolo Record
Tyres - Vredestein Moiree 28 x 622
QR's - Campagnolo

Brakes -

Shimano Dura Ace - Levers
Shimano 500 brake calipers

Gears -

Stem mounted Suntour levers
Front mech - Shimano Altus
Rear mech - Shimano XT

Crank arms - Stronglight

Bars -

3 TTT

Stem -

3TTT

Seat -

Brooks leather vintage

Finished in a beautiful blood red colour with hardly any damage or chips.

I am possibly going to sell this but need an idea of its value - cheers !

Well, if no one else is going to take a go at this, I will.
Somewhere between £175-£265, depending on size, condition, decals, original parts, and demand at any given moment etc.
Would be easily worth that in parts.