Summary: As a beginner to the graphing calculator I am amazed by the ease of function of the TI-83. If you are not advanced with the functions of a graphing calculator I recommend that you start with the TI-83 as I have found that others are confused with the functions of the TI-84.
Summary: expensive for a used item but satisfactory so far. i bought it for someone as a school gift to use for mathematics class. it compares favorably against the other bods online however. thats why i bought it.
Summary: I'm a engineering student in college, so a graphing calculator is a must. This T-83 was essential for my homework quiz and test. This product was popular and works beautifully. It took awhile to understand, but once you do it became something to carry around all the time like a cellphone.I'm glad I bought it and a spare just in case to help.