Here's a repeat of my formula for establishing a fair second hand price for an e-bike, taking into account the fact that the battery is a large proportion of the cost but has a very much shorter life than the bike part. Therefore the two have to be dealt with separately.
One year old battery: Half the current replacement cost of a battery is established to give half value left.
Two year battery: Zero value left.
For ages in between in each of the above cases, the price established should be pro-rata, and in cases where the battery has been replaced at some point, the same pro-rata rule can be used against it's age.
Then the start point of the e-bike's separate value is established by deducting the current new battery price from the original purchase price and then a depreciation percentage is deducted in the same manner as for other vehicles, the initial depreciation quite high as is usual:
I year old bike: 25%
2 year old bike: 35%
3 year old bike: 45%
4 year old bike: 55%
5 year old bike: 60%
6 year old bike: 65%
7 year old bike: 70%
8 year old bike: 75%
9 year old bike: 80%
Then to the discounted price of the bike only, any residual value of the battery as established above is added back to give the fair second hand price.
On this basis, that Agattu would be about £580 to £715, less a bit for the damage. I'm not able to be precise since I don't know precisely what it was bought at since there were some rapid changes in the new prices two years ago.
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