This Texas Instruments TI-83 graphing calculator was waiting for me on a table at the local flea market for a mere $2. These calculators are often overlooked because who needs a used calculator when a brand new one is only a few bucks, right? Wrong… Graphing calculators are extremely expensive (TI-83’s are still $100 brand new) and almost every 6-8th grade student needs one for calculus class. The worst part is they’ll never need to use them again and because of that thrifty parents love to buy them used on eBay and Amazon.
Price Paid: $2.00
Sale Price: $26.95