The Collaborative International Dictionary of English v.0.48:

Oversell \O`ver*sell`\, v. t. [imp. & p. p. Oversold; p. pr. &
   vb. n. Overselling. ]
   1. To sell for a higher price than; to exceed in selling
      price.
      [1913 Webster]

            One whose beauty
            Would oversell all Italy.             --Beau. & Fl.
      [1913 Webster]

   2. To sell beyond means of delivery. [Brokers' Cant]
      [1913 Webster]

   Oversold market (Brokers' Cant), a market in which stocks
      or commodities have been sold "short" to such an extent
      that it is difficult to obtain them for delivery.
      [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

32 Moby Thesaurus words for "oversold":
   aggrandized, amplified, ballyhooed, disproportionate, exaggerated,
   excessive, exorbitant, extravagant, extreme, grandiloquent,
   high-flown, hyperbolic, inflated, inordinate, magnified, overdone,
   overdrawn, overemphasized, overemphatic, overestimated, overgreat,
   overlarge, overpraised, overstated, overstressed, overwrought,
   prodigal, profuse, puffed, stretched, superlative, touted