I added some information due to some painfully low offers via PM. TLDR:
Frame + fork new: between US$ 500 and 700
Here for: £250
Wheelset: Halo Fix-G Track Hubs laced to Ambrosio Keba Rims with Conti 2000 Tyres in 42C
I am open to reasonable offers, in particular for combining the frame with some of the other parts.