Can anyone help with a rifle valuation?

[NH Shooter]

Looking to get rid of mine perhaps for something smaller and lighter.

 

VFC ES Recon M4.

Everything works perfectly.

Angled FG, sling adapter at front and single point ambi sling at buffer tube

Rhop.

Lonex hop unit, with mnub.

Tanio Koba twist barrel. (hence barrel extension)

Wire upgraded to asg ultimate silver wire.

Deans connected

Aoe corrected, properly shimmed (auto shims removed)

recently serviced.

330fps

Headshots accurate, 65 yards.

Bodyshot accurate, 80 yards. (will measure and YouTube to verify come selling)

 

What would a reasonable price be for it?

 

(I have mags, etc... But I'm OK pricing those myself)

 

[Monty]

£350?