The city of Hiroshima announced on Tuesday that they planning on auctioning off pieces of the stadium to help pay for whatever will become of the plot of land (there's apparently a dispute about how the land should be used).
Amongst the items they plan to auction off:
Various kinds of seats
The pitching rubber
The letters that were on the outside of the stadium
Seating charts that were used inside the stadium
In all, over 70 kinds of items, some with current and former player autographs
The city is also planning on selling key chains and mobile phone straps made out of the grass and dirt at the old stadium.
All told, the city is expecting sales of about 130M yen.
A city meeting to discuss the upcoming schedule (when to officially shut the stadium, when to begin demolishing it), future land use, and various other related issues is set to take place some time this month. As of now, the old stadium will shut its doors for the last time at the end of March. But depending on how the meeting goes, it's entirely possible that there might be a delay in the entire schedule.
In other Hiroshima baseball stadium related news...
The Hiroshima High School Baseball Association is asking the city of Hiroshima if it can play more games at Mazda Stadium (the report also mentions the old stadium but I don't see how that will be possible since it's shutting down at the end of March).
Last year, the Hiroshima High School Baseball Association was allowed to use the new stadium for 2 games (1 day) and the old stadium for 18 games. This year, they will be allowed to play 5 games over three days at the new stadium.