The last merch day for Rokkenjima probably
Rena, Rika, and Mion Wood charms from Kizuna
Rika and Satoko Cards
EDIT: 2/26/18
Today is the last merch day report definitely.
Higurashi Matsuri
Higurashi Daybreak+Kai (Spoilers for EP7 Character)
Higurashi Jan
Original Higurashi
Close up on the Matsuri set - postcards, soundtrack, and game.
Keiichi and Rika figures, Rena punching bag balloons, and bat and syringe pens.
Higurashi Jan Artbook and another Memorial book
Higurasni no Naku Koro ni OP CD, Jan Drama CD, Higurashi Tactics CD, Escape CD, and DJ drama CDs.
Lastly! Umineko PS3 port from @TheGoldenWitch! Spoilers for Chiru characters on Chiru cover.