Selling your textbooks at the end of a semester to recoup some of their outrageous price tags could get even easier with Quirky's Fader highlighter. After five months the yellow streaks will disappear completely, netting you top dollar for your pristine books.
At the moment Quirky is still putting out feelers for demand and gauging how much students would be willing to pay for it. But according to its site, the average scholar spends $US1168 on textbooks during a four-year degree. So Quirky could probably still charge a ridiculous amount for the Fader if it meant that students could get considerably more cash for their used reference materials.
It also means you're not giving your competition in a lower grade an advantage with a used textbook that includes all the important bits already highlighted. [Quirky]