If you're looking for manga similar to $100 is Too Cheap, you might like these titles. All recommendations are made by Anime-Planet users like you!
Both "$100 is Too Cheap" and "The Teddy Bear Murder Case" (one of the chapters in Le Theatre de B) are one shots about detectives solving a case. The setting and art are different, but both detectives take steps, with some help, to solve the case. If you liked a little mystery and one shots, check these out.
Fourteen-year-old Nico spends her free time on a cell phone-based dating service, but not for the reason you'd think. Hoping to someday become a fortune teller or maybe even a spy, the girl uses the dating service to determine what people are like merely by listening to the sound of their voice, and soon, she manages to accidentally befriend a Yakuza boss. Now Nico has the opportunity to use her curiosity, intellect, and keen sense of hearing to foil the schemes of kidnappers, crooked athletes, and forgetful assassins - but is it a good idea for a junior high school student to work for the Yakuza?