In preparing for my 2003 trip I contacted a seller I noticed on ebay selling charts in qty's of 2-3 . I emailed him and told him I needed LOTS of charts and gave him 3 months to get them together with my travel plans. He then mailed me at one time huge qty's of charts for $1.50 ea.
I'd go that way again. And as the previous poster he was a merchant
marine.
However we used
Garmin Bluecharts every day.........Never the paper