anchor.diff:  
     # Whether a user can make an offer on a work
     isOfferable: Boolean
  +
  +  # Whether a user can make an offer on the work through inquiry
  +  isOfferableFromInquiry: Boolean
     isOnHold: String
     isPriceHidden: Boolean
     isPriceRange: Boolean
  
positive.code:   isAcquireable: Boolean
    isForSale: Boolean
    isOfferable: Boolean
    isSold: Boolean
    listPrice: ListPrice
    price: String
  
negative.code: 
    # Whether a user can make an offer on the work
    isOfferable: Boolean
  
    # Whether a user can make an offer on the work through inquiry
    isOfferableFromInquiry: Boolean
    isSold: Boolean
    saleMessage: String
  }
  