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Since 2005, Math4Sale, Inc. is the #1 source for schools to save money on new, refurbished, and quality used graphing calculators. 

Calculators - It’s what we do! 365/24/7, for the last 10-years. We don’t outsource our customer service, we don’t drop ship our products, and we do everything in house to ensure that we can 100% serve you and offer you the best buying experience while also saving you a lot of money! 

We accept purchase orders directly and offer bulk discounts for large school districts. Simply give us a call at 800-805-3392 and we’ll be happy to assist you. If you already have a PO ready to go, simply fax us at 888-325-6940. 

In an effort to help schools and students combat the rising cost of education - we’ve been committed to offering the highest quality Texas Instruments graphing calculators at remarkable discounts.

We've had the distinct honor of being able to serve thousands of schools over the last 10 years and saving them A LOT of money on their graphing calculator purchases. 

We are 100% committed in continuing to serve you and your needs for saving money on graphing calculators. 

We know you have many choices online and it our goal to provide you with: 

  • Excellent customer service,
  • Amazingly fast shipping times,
  • Top Quality Products
  • and Extremely competitive prices


We may not be the cheapest on the market, but we can guarantee that you get what you pay for. Each refurbished item we sell goes through a 12-point inspection and is quality-checked twice-over again before it is shipped. We take our jobs very seriously in our state of the art facility and every-item is combed over to ensure you get the absolute best product. We offer a 30-day money back guarantee on all products, and a 90-day warranty on used, 180-day on refurbished, and 1-year on NEW (OEM Bulk) and New Retails product). If there’s ever an issue we replace the units right away from our in-house inventory of thousands of products on hand. 

We carry a wide selection of all the popular graphing calculators including: Texas Instruments TI-83 Plus, Texas Instruments TI-84 Plus, Texas Instruments TI-84 Plus Silver Edition, Texas Instruments TI-89 Titaniuim, Texas Instruments TI-Nspire Calculators, Texas Instruments TI-Nspire CAS Calculator, Texas Instruments BAII Plus and Professional Financial Calculators, Texas Instruments TI-73 and TI-73 Explorer Graphing Calculator, School Yellow Classroom Sets and Teacher Packs.

Since 2005 we've pledged to always provide our customers with the best prices and the best service. In our 10th year in business - we've been honored to serve over 100,000 happy customers across our multiple sales channels including Ebay, Amazon, and our Website.

We understand that the cost of education technology is continually increasing and it is a necessity to own a quality graphing calculator to thrive in today's competitive education environment.

Buying refurbished and/or used saves you money without compromising functionality. With savings from 20-50% off retail through Math4Sale, Inc. it's a great deal! This is our 10th year in Business selling quality refurbished graphing calculators to schools just like yours.

We absolutely guarantee you will be 100% satisfied with your refurbished calculators, that's why we back them by our own 6-month in house-warranty, and if there's any issues we guarantee to take care of them asap with our dedicated in-house team. 

Our staff meticulously goes through a 12 stage process to ensure each unit is properly inspected and of the highest quality before it is shipped to you. 

We've been able to save schools over 20-50% off of retail prices - and to date that's been over $1,000,000 in savings! 

In 2014 we plan to continue to increase the savings for you. 

We thank you for the opportunity to serve you,


Our Family At Math4Sale, Inc.


Questions? Please see our FAQ page or E-mail us [email protected] We'd love to hear from you.


Are you a school looking to submit a Purchase Order? We specialize in working with every school’s unique needs - Call us at 800-805-3392 for a quote.

We accept purchase orders directly and offer bulk discounts for large school districts. Simply give us a call at 800-805-3392 and we’ll be happy to assist you. If you already have a PO ready to go, simply fax us at 888-325-6940. 


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