A one of a kind Rolls Royce Limousine, designed by Michael Jackson himself, is now described by experts as “priceless” following his sudden death last week. The unique vehicle was part of the original Jackson auction catalog that was set to be sold in April.

But now it seems the price of Michael Jackson’s stretched Rolls Royce Silver Seraph is impossible to estimate. The cost of all Jackson memorabilia has shot through the roof according to the Associated Press, and what’s more precious than a Limo with an interior that was designed by the King of Pop himself?

The car was set to be auctioned in April as part of Julien’s Auctions at the Beverley Hills Hilton, but a dispute halted the auction and the items, including the limo, were never sold.

The singer’s death triggered a surge in the Jackson collectibles market. By as early as Friday morning, hastily designed T-shirts emblazoned with the words “R.I.P.” and “June 25, 2009″ alongside his image were available online. On Friday afternoon, an Internet search for Jackson items turned up more than 24,000 offerings; there was a rush on all auction sites with buyers particularly drawn to the fixed-price “buy-it-now” items.

In addition to surging volume, EBay reported the average selling price for Jackson items jumped 31 percent on Thursday from daily averages the previous week. For example, a fedora hat signed by the man himself was being offered at $9,795.

So if Jackson’s hat is valued at almost $10,000 what do you suppose his Rolls Royce Silver Seraph is worth?
The original auction catalog value of the limo was between $140,000 – $160,000, but now how it’s anyone’s guess.