how much is ti-83 plus calculator actually worth

The TI-83 Plus calculator is typically listed around $19.95 used on eBay, with prices ranging from $12.50 to $28 depending on condition and included accessories. There is also a new listing at $58. These are current eBay asking prices — not sold values — and reflect what sellers are hoping to get. For a more accurate idea of what it might sell for, you'd need to consider the condition and completeness of the calculator (e.g., batteries, case, and functionality). You can compare these listings directly on eBay to see what fits your item best.