I'm a big fan of scents and I'm also a bargain shopper and let me tell you something: it's true that you can get cheaper room fragrances at the grocery store but, for a little more money, you can get something that actually smells good at Pier 1 Imports.
Yesterday I bought a few of these gel fresheners at Pier 1 -- the company no longer offers online shopping, but they're available in-store for $2.48; the list price is $5. According to the company:
A designer look and long-lasting scent too! Our Gel Fresheners provide up to 6 weeks of continuous fragrance. Made with all natural ingredients and high quality aroma oils, simply open and set aside – let the freshener do the rest. Available in five colors and fragrances, these fresheners also make a great little gift. Choose from: Pink - PassionGreen - EnergizingPurple - RelaxationGrey - InspirationYellow - Meditation
They're perfect for dorm rooms.