Well...FC I agree entirely that 120 gbp is in excess of what they are worth, but 10-15 gbp is pushing it a bit far the other way. Decent steel forks for contemporary bikes are actually quite expensive - Surly (nothing that special) are 130-190 gbp, and that’s pretty standard...
If people want to get ripped off on a fork that pops up an bikes regularly, that's up to them, but you don't have to inflate prices just because you can.
It's why I'll not sell to anyone that's not 'mates' or 'mates rates', as I don't trust some nob will not put it on ebay and try get £150 and create an illusion of 'this must be the price' .
Bring back retro meet boot sales and swaps again.
Anyway I'll delete in a few days as a build thread isn't the thread to talk about it, but many people have got I to this a bit later and think this must be the price.
FC - indeed broadly agree with you, and liked the days of browsing at bike jumbles, finding things which I wanted and others didn't and vice versa. Everything's gone weird right now, and I can't find things new, let alone secondhand. I need a new jump frame (three withdrawn from sale...) and some 100mm 20mm axle forks (none anywhere, even new) it's baffling, frustrating and expensive.
And on here, I still don't understand the whole Klein thing. I had a Klein, 1992-4. It was pretty dire actually, compared with the steel bikes I had (Orange, Marin) - they had much better geometry, ride quality and climbing ability. Quite pleased to see the back of it...