Ooooooh, look!!! If you zoom right in you can see that the 35 year old rubber is showing some signs of age
This bike is garage queen/concourse standard, in the current market you could get plenty for those tyres, rideable or not they look great, £100 anyone?
£45 Probably more. And then you have the mint group set, £200?
£50 More? The wheel set? another £150+ to the right buyer?
£50 That stem? £50-75
£15, the bars? The grips? The saddle and seat post? The pedals? The frame and forks?
There's way more than £350 there just from the scavengers perspective, you get a couple of collectors or Muddy Fox enthusiasts in a bidding war there's £4-£500 easy.