This is the "Oxford Student Edition", i.e. the version that sells in the UK new for about $64 USD. The version sold in the US is hardcover and sells new for about $125. This version has a softcover. Other than the softcover the book is exactly the same, and the quality of the printed page is good (it's better than cheap international editions that use pulp paper).

The book is in used, very good condition, with no annotations. Corners a bit frayed.

I am selling for $50 USD, which is the cheapest that the UK version sells for used on amazon.co.uk (30 pounds). For example see here:

http://www.amazon.co.uk/gp/offer-listing/0195102681/ref=sr_1_1_olp?ie=UTF8&qid=1353880628&sr=8-1&condition=used