Her are the Land Registry survey results for Wales.
http://www.bbc.co.uk/news/uk-wales-13282978
Nowhere in West Wales do the prices seem as high as London. However, prices is West Wales have not collapsed. In fact, Ceredigion, Pembrokeshire and Gwynedd saw prices increase in March. The collapse which has occurred are in ex-heavy industry areas which one could say are possibly similar to Detroit in that their reason for being in existence is no longer there.