I've been noticing a slight trend. But maybe it's just me. People tend to sell articles faster 1 by 1 rather than 5 by 5. What happens if I go 55 by 55? I'm thinking that if I try to sell duplicate copies of 55 article packs, the response would be considerably better than selling one copy of 5. Discuss.
Remember that if you sell duplicate copies, then it wont be worth anywhere near as much, and you'll probably end up only selling a couple of copies. My advice would be to split the articles up into niche, or if they're all on the same niche then split them into tens, but keep them unique. 5 unique articles will sell a lot better than 55 duplicate articles