2013 Key Calendar Bundle for 5,000yen at Comiket 83

They’re offering in a 5,000 yen set the following:
◆2013 Key Calendar

2013 January to 2014 March – featuring Komari in traditional dress and halloween costume, Kud in sailor uniform, Rin with nekomimi in casuals, and 7 other Little Busters illustrations.

◆KeyCLASSIC – live performances of major songs from these games:

01.Last regrets～Classic～ /『Kanon』より
02.鳥の詩～Classic～ /『AIR』より
03.青空～Classic～ /『AIR』挿入歌
04.メグメル～Classic～ /『CLANNAD』より
05.だんご大家族～Classic～ /『CLANNAD』より
06.時を刻む唄～Classic～ /『CLANNAD～AFTER STORY～』より
07.Little Busters!～Classic～ /『リトルバスターズ！』より
08.My Soul,Your Beats!～Classic～ /『Angel Beats!』より
09.一番の宝物～yui.ver Classic～ /『Angel Beats!』より
10.Philosophyz～Classic～ /『Rewrite』より
11.Harvest～Classic～ /『Rewrite Harvest festa!』より
12.リトルバスターズ！メドレー Classic

◆Rewrite ＆ Rewrite Hf! Arrange Album "dye mixture" –

MintJam’s rock re-arrangement of Rewrite songs.

◆And more, but unannounced for now. [Official Page]

And you can only get this if you attend C83. No mail order…
But you can check out Yahoo Auctions Japan after the event and pick them up from sellers at a premium price. Also they might open up mail orders after the event if they have spares. Use a proxy mailing service like Yokattaweb.jp or Japonicomarket.com.