When Leslie DeAngelo got married 16 years ago, she yearned for a designer dress. But her eyes were too big for her wallet. So after she said ''I do,'' she started selling sample and overstock dresses at discount prices at her store, Vows, in Newton. ''We're basically a TJ Maxx for bridal gowns,'' she said. Now her racks are stuffed with gowns by Reem Acra, Lela Rose, and many others. (Neiman Marcus recently closed most of its bridal departments - guess who got the goods?) Dresses are at least 50 percent off the original prices - which means that some of them still sell for thousands. Click through some of the store's inventory on its website, www.bridepower.com. You'll notice that most of the dresses are available in sizes 8 or 10, but remember: designer gowns run small. 10 a.m.-8 p.m. on Tuesday and Thursday; 10 a.m.-5 p.m. on Wednesday, Friday, and Saturday; you can make appointments