Clark was shopping recently for a new computer and he came across one that cost $339 with several rebates. He found one that was $30 more with the same features and only one rebate. That was at Staples. He ended up buying the more expensive one, he confesses, but that’s because rebates are much easier in some stores than others. Staples is one of those stores; Costco is another. But for the most part rebates re a huge hassle. Buy where you know you will get your rebate money or don’t buy there at all.