Peter Reynolds - Specialising in evangelical and reformed Christian books printed in the 19th and 20th centuries. - http://www.peterreynoldsbooks.com/
Greensleeves Books - Mind, body and spirit mail order book service. Specialising in out of print and secondhand books. - http://www.greensleevesbooks.co.uk/
James Drummond - Northern Ireland based, offering evangelical Christian used books, including a good number of commentaries. - http://www.jamesdrummond.co.uk/
Rosemary Pugh Books - Antiquarian and secondhand theological and religious books; specialises in academic works. - http://www.freenetpages.co.uk/hp/RosemaryPugh/