Unable to buy Eternia Crystal in hardmode, Balista Staff, Red Riding Leggings

[EoLnewbie]

@popstarfreas

• Fixed Ballista Staff being unpurchasable from Tavern Keep Shop
• Fixed Red Riding Leggings being unpurchasable from Tavern Keep Shop
• Fixed Eternia Crystal Purchase Price not updating based on progress (not sell price)

Fixed according to post