Help with valuation on my Swiss army bike?

I’m from the USA but live in Germany. I’m trying to sell this Swiss army bike soon. But I have no idea what it’s worth really. I heard they are rare and quite collectible, thus valuable. Does anyone know about these? Unfortunately I don’t know the year. My father said he laid €2000 euros for it a few years ago in Switzerland. But I almost doubt it’s worth that? Compared to others I’ve seen on eBay and stuff.
Thanks!

by Effective_Canary6323