Reardon bought the number plate after he won the 1974 World Snooker Championship and went on to own it for nearly 30 years, according to the item's description.
The six-time world champion apparently sold it to the current owner in 2004 and included a signed letter wishing him "all the best".
The current owner says: "It brought him a lot of good fortune and since I've owned the plate I too have done extremely well in life and in business. Perhaps it's just a lucky plate for whoever owns it."
A Rolls-Royce once driven by former Queen lead singer Freddie Mercury has been snapped up at auction for £74,600 - six times over its guide price.
The 1974 Silver Shadow only has 62,000 miles on the clock despite being used by the singer between 1979 and 1991. The car is heading to an unnamed Russian businessman who sealed the deal in a telephone bid.
Sir Jimmy Savile's gold suits, Cuban cigars and beloved Rolls-Royce will go on sale today as the late DJ's belongings goes up for auction.
Thousands of items of memorabilia owned by the broadcaster and Top of the Pops host will be sold to go towards his charitable trust.
His trademark tracksuits and jewellery, including a £12,000 gold and diamond encrusted Rolex watch, gold identity bracelet and rings, will all go under the hammer along with the first ever chair from his Jim'll Fix It TV show.