Speaking for my shop here.

Because we sell bows that run the price range of about $350 to $800 and accessories that run from $20 to $250. Therefore we stock arrows that run from $55 to $220 per dozen.

Because no every one can afford a $1200 bow rig. But if you can afford a $1200 rig and then you decide to skimp on the most important aspect of the entire rig is just stupid.

The guy that buys a Bear lights out package that retails for $529.99 for the bow, rest, sight, peep, sling, stabilizer, and quiver, that shoots well above its price tag, probably can't afford $140 for a dozen arrows. He may have saved for several months to purchase this package and to him $60 for a dozen arrows is expensive.