We've just put our house on the market! It's near the Centre for Alternative Technology and is a 3-4 bedroom house plus a self-contained one-bed 'granny-flat' or sublet on the side, by a river! It's been well-renovated and has a large garden and has loads of potential. Only £185k! I love the whole valley - I'm just moving to a smaller place in the valley. I even spent a while commuting to London for work - you can go there and back in a day by train. More info?
http://www.davidthorpe.info/house-for-sale-mid-wales.htm