I haven't posted one of these in a while. I thought I would post another more recent list. On this post, if you sell bookmarks, feel free to post a link in the comment section.
Stores
Amazon - http://smile.amazon.com/AllPosters - http://www.allposters.com/
GoHastings - http://www.gohastings.com/
Poster Revolution - http://www.posterrevolution.com/index.cfm
NECA - http://thenecastore.com/
Etsy - https://www.etsy.com/
The Bookmark Shop (English) - http://www.thebookmarkshop.com/buybookmarks.htm
Pomegranate - http://www.pomegranate.com/index.html
Paper House Productions - http://www.paperhouseproductions.com/
Minor stores
Pulpcultcha (Australian) - http://www.popcultcha.com.au/Cool Chaos - http://www.cool-chaos.com/
Just Another Sunset - http://www.justanothersunset.com/
Urban Collector - http://www.urban-collector.com/
Auction sites
Ebay - http://www.ebay.com/Listia - https://www.listia.com/signup/8326656
eBid - http://www.ebid.net/
Other
Star Wars Action Team (SWAT) - https://delreystarwars.fancorps.com/signup/