If you want a cheap pair of cottered cranks, Cycles of yesteryear in Surbiton stock them (http://www.cyclesofyesteryear.com/cycleshop/sparepart.htm) he occasionally gets used ones which are probably higher quality ( I can't imagine the £10 are great quality!)
If you want a cheap pair of cottered cranks, Cycles of yesteryear in Surbiton stock them (http://www.cyclesofyesteryear.com/cycleshop/sparepart.htm) he occasionally gets used ones which are probably higher quality ( I can't imagine the £10 are great quality!)