Got a wedding or other formal event (Quinceanera? Military ball? Beauty pageant?) to go to this summer? Simplydresses.com has hundreds of special occasion dresses on sale right now, long and short, in plenty of styles and colors, for $100 or less. There’s even a gown inspired by one Reese Witherspoon wore to the Oscars, marked down from $238 to $69. The site has an overall rating of “good” at bizrate.com.