Babe Ruth's 1927 World Series ring is up for auction on Lelands.com and with still plenty of time to bid on it, bidding has already gone to more than $500,000.
Also up for bids is the contract that sent Ruth from the Boston Red Sox to the New York Yankees in 1919.
Actor Charlie Sheen was the owner of these two items who put them up for bid, ESPN reported.
"I've enjoyed these incredible items for more than two decades and the time has come," Sheen told ESPN. "Whatever price it brings is gravy."
Ruth hit .400 in the 1927 series, with two homers and seven RBI, leading the New York Yankees to a 4-0 sweep of the Pittsburgh Pirates.
That was the year that Ruth set the regular-season home run record of 60 that wasn't broken until Roger Maris' 61 in 1961. Ruth had 165 RBI that season and batted .356.
This was one of the all-time great teams and seasons in baseball history.
The bidding for the contract for sending Ruth to New York had already reached $345,000.
Sheen told ESPN that the items were purchased in the early '90s, and that he displayed them in a bar area in his house.