cmaps for sale, work fine, most from 2001 ish but i've been using them without any issues and you can update if you want.
m-ew-b050 Dartmouth to Southampton ms
m-ew-b018 english channel central ms+
m-ew-b051 lymington to dover ms
m-ew-b127 solent to channel islands wide
m-ew-c132 St Malo to L'aberwr ms+
m-ew-b006 barfleur to dunkerque ms
m-ew-b007 cherbourg to cap frehel
http://chartcatalogue.c-map.no/other...=EWW&us_crtr=1
http://chartcatalogue.c-map.no/other...=EWS&us_crtr=1
http://chartcatalogue.c-map.no/other...=EWL&us_crtr=1
http://chartcatalogue.c-map.no/other...=UKA&us_crtr=1
http://chartcatalogue.c-map.no/other...=FAS&us_crtr=1
covers most of the channel in detail, haven't got a clue what they are worth but seem to be in the £20-£30 range on ebay and i believe you can update or upgrade to larger/different areas using these in exchange if you want as well at your local cmap dealer. Try an offer if you want
(this gives you an idea on cost, swapping/upgrading saves you money versus new)
http://www.yachtbits.com/c_map/?gcli...FYQMfAod_GLvcQ