One of the delights of old photographs that have been scanned and brought back to life, is walking back down familiar streets, looking at shop fronts that have not been there for forty years. With this photograph, there is an additional challenge, because all the shops are in reverse, viewed as they are through the reflection in a car showroom window. This week's bargain is the shops at the bottom of Bull Green, Halifax. Those of a certain age will be familiar with the names, even in reverse : Greenwoods the Bookshop, the El Toro Coffee Bar and Lewins Pub. A free trip back in a time machine - now that's a bargain.