First of all, you'd better buy the version marked Liu Xiao. Liu Zhu is very important.
Notes on Shi Shuo Xin Yu, Xu Zhen, two volumes, Zhonghua Book Company; Textbook Shi Shuo Xin Yu, Yong Yang, four volumes, Zhonghua Book Company; Notes on Shi Shuo Xin Yu, Yu Jiaxi, three volumes, Zhonghua Book Company. The above three kinds are all with Liu's annotations, all are vertical and traditional, all are paperbacks, and the printing is not bad (Xu Zhen's annotations in the newly reprinted Shi Shuo Xin Yu are poor, but those two sets are good). Zhonghua Book Company published an anthology and a photocopy, which are not recommended. ...
Shanghai ancient books published a set of "Shi Shuo Xin Yu Translation Notes", two volumes, I didn't buy it, I read it, and I can be sure it is a complete book. There are notes and translations, paperback, simplified horizontal arrangement, which looks good when relaxed, but there are no notes from Liu. If you just look around, I recommend you to buy this set, but the three sets mentioned above are better. The ancient society also published Zhu Zhuyun's Notes on Shi Shuo Xin Yu, which is mainly Liu's notes, vertical and traditional, and generally printed.
Phoenix Publishing House has Liu Qiang's "Comment on the Mandarin of the World", with Liu's annotations. The cover is poor and the printing is average, but it is actually not bad.
According to my experience, the title of each article in Shi Shuo is mostly book selection. You can go to Douban or Joyo first. Of course, the most recommended is Yu Jiaxi's Notes on Shi Shuo Xin Yu, and beginners recommend the Shanghai ancient book Shi Shuo Xin Yu Zhuan. You can contact me if you have any questions.