Hi all. Looking for some advice on valuing an Original 66 to sell.

It has been re-sealed and timed (with 2 new gears as well). and shoots very nicely. 550 fps with 8.3 grain Bisley Practice and very accurate as it should be.
The stock has been shortened at some point in it's life, so has 2 vertical cut lines in it.
The caps for the gears are a bit scuffed.
Has the original diopter sights.

I'm not looking for top money for it as it will never be 'mint' and it still gets used once a week for bell target. Just looking for a fair price (to put towards a new S200 match).

I got told my a chap at bell target that it would go for about £400. Is this about right or too high?

Thanks