Here's a link to GearBest for 50 darts for $2.50 with free shipping. I've used them for the past six months and had better luck with them than most Chinadarts (e.g. cut down ACCs, older Artifacts). At the last two wars I've attended, I got constant questions about buying them. I'm pinning this thread so I can tell people to look on NerfHaven.
Do not buy the ones with red tips, they are rock mode. Sweet Orange are the soft-tipped darts.