Hi Joaogam,
The problem is, that from this old Numbers, the new owner will not find new spares like screws, wheels, and so on. I asked all over the world, from Austria to Netherlands and to China and also the inventor personal could not help.
From this view, I think your friend should not ask for much. If you red this page and the problems I got, you will understand… I paid about € 130 for a good looking bike. I thought it was a fair price, but I did not know how old the materials are (The strida 1 was produced about 20 years ago!). So in the first week of using, things broke…
At least I found a polish locksmith who could help me with the ring (see below). It was a hard work and nobody can tell, when the time for the next part will come… And I am still looking out, to get a new unbroken back wheel, I myself fixed temporary.
So this is my story. Was a big disappointment! I hope you can crab my message for a fair selling.
With nice greetings and best regards,
Dony