The Collaborative International Dictionary of English v.0.48:

Sale \Sale\, n. [Icel. sala, sal, akin to E. sell. See Sell,
   v. t.]
   1. The act of selling; the transfer of property, or a
      contract to transfer the ownership of property, from one
      person to another for a valuable consideration, or for a
      price in money.
      [1913 Webster]

   2. Opportunity of selling; demand; market.
      [1913 Webster]

            They shall have ready sale for them.  --Spenser.
      [1913 Webster]

   3. Public disposal to the highest bidder, or exposure of
      goods in market; auction. --Sir W. Temple.
      [1913 Webster]

   Bill of sale. See under Bill.

   Of sale, On sale, For sale, to be bought or sold;
      offered to purchasers; in the market.

   To set to sale, to offer for sale; to put up for purchase;
      to make merchandise of. [Obs.] --Milton.
      [1913 Webster] Saleable

WordNet (r) 3.0 (2006):

for sale
    adj 1: available for purchase; "purchasable goods"; "many houses
           in the area are for sale" [syn: purchasable, for
           sale]