No bother. They've bottomed out around that, as thats what they break for. As parts are getting scarce, they won't go much lower.
I assume as your YB'ing a Mk1, you'd only want engine/box/loom/anclilleries etc?
Maybe worth ringing the RS breakers such as North Yorks RS spares and seeing how much a YB and all the gubbins is going for.