Brno 581 Auto .22LR - value?

A friend wants to buy my 1959 Brno 581 and I'm not sure what it's worth. It's in beautiful condition for it's age, the bluing is virtually unmarked. The chequered walnut stock has a few vey minor, very shallow, little impressions here and there - not many. The butt plate is in very nice condition, has the original flip up rear sights and front sight hood. The 8 shot magazine is still like new and the bore is sharp and shiny.

I purchased this from an deceased estate 17 years ago. Since that time I've put less than a brick through it as I mainly use my Brno Model 1 and Model 2. Looking at the condition I doubt it's had more than two bricks through it in it's entire life. It comes with a well used (marked made in West Germany) Zeiss Daital scope with 4x plex reticle mounted in high quality low Hilver steel rings.

It also shoots subs perfectly and has never jammed once. Shoots around 0.6" at 50 metres. For those that like to use suppressors, the NZ made Silent Kill will fit over the front sight onto the barrel. The early model Brno 581 has better machining and finish than the later made CZ 581 and 511 rifles.

As it's basically a safe queen I may as well sell it. Has anyone an idea of it's realistic value/price? No kiddie remarks please.