The ridicule is due to the fact that, whilst value is indeed perspectival, your perspective of the bikes worth seems to be inflated by approximately £400 above what anyone in their right mind would pay for this. Realistically you’ll be quite lucky to get £800 even if you parted the bike out. Feel free to ignore that assessment though, however I would strongly urge you not to disclose your full phone number on a public forum!
The ridicule is due to the fact that, whilst value is indeed perspectival, your perspective of the bikes worth seems to be inflated by approximately £400 above what anyone in their right mind would pay for this. Realistically you’ll be quite lucky to get £800 even if you parted the bike out. Feel free to ignore that assessment though, however I would strongly urge you not to disclose your full phone number on a public forum!