You should be so lucky! Most people hang onto Dyce once they have forked out the money for it as it is one of thise books i think you tend to keep forever. Most secondhand textbooks that arent wanted are usually sold between years at the university as it is just so much easier. I sippose you could try amazon or ebay but i wouldnt hold your breath Good luck!
ebay occasionally, amazon or when term starts order through uni for blackwells and get a discount of 16%, we do this at Liverpool anyway so your reps should be able to organise it xx