I've been buying and reselling TI 84 plus CE calculators. Price match to whoever has em cheaper (currently Walmart at $88, I think). Staples has also had a $15 rebate on em as well, so you'll pay about $75 after tax and rebate. They sell for $100+ on eBay all day. So you'll not only get rid of your gc's, you might make a few bucks.