Warren Buffett's 2006 Cadillac with only 20,310 miles will be auctioned off to benefit charity

Warren Buffett's old 2006 Cadillac is going to be auctioned off to raise money for one of his favorite charities now that the billionaire finally upgraded his car to a newer model.

Buffett's old DTS sedan will go up for sale online at www. proxibid.com starting Wednesday. The auction will run through Feb. 19.

The 2006 Cadillac has only 20,310 as Buffett enjoys a short commute to work at Berkshire Hathaway's headquarters in Omaha. Based on past auctions involving Buffett, the car will draw much more than its Kelly Blue Book value of between $10,000 and $11,600.

The last time Buffett's car was auctioned off, his 2001 Lincoln drew $73,200 — well above its book value of $11,200.

All proceeds will go to the nonprofit Girls Inc. of Omaha.