I had a Concorde Gavina SL around 1990. Great frame that rode really well, very smooth and tracked straight. Might have been lucky, but so good another similar frame is one of the very few n+1 additions I’d still consider.
Unfortunately international freight costs now all but rule out importing frames from Europe and the US to New Zealand. If it was local to me, 59/60x58/59 c-to-c, and I could inspect it first I’d likely pay USD425-475 for the frame and fork only depending on condition, maybe north of 500- with the seatpost included and if I could be sure a 30mm tyre would fit between the chainstays (everywhere else looks good for clearance, unlike many frames of this era).
I know that doesn’t help the OP much but there we are fwiw.
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Nothing quite says wall hanger like drillium toe straps