Eureka 4700D Maxima Upright Vacuum
Eureka’s Maxima 4700D is a very inexpensive vacuum with adequate cleaning ability.
Retailing for ~$60 as of the time of this post, the 4700D has an attractive price tag. Whether it represents a good value depends on what you want in a vacuum.
The Eureka Maxima is a bagless, canister-style vacuum. It features a 12 amp motor and weighs a reasonably svelte 14 pounds. Onboard tools include a dusting brush, crevice tool, and extension wand.
For someone vacuuming only on carpet, without extraordinarily high standards, the Eureka is a great value. If you don’t fit this category, or have a few more dollars to spend, the Hoover U5140 is close in cost but has significantly better performance. The Eureka 4700D’s  biggest downfall is that air exits near the front of the vacuum, blowing dust around as you attempt to pick it up. This is frustrating, but if you are on carpet that is not too dirty, it may not be noticeable.
For details and pricing information, check out the Eureka’s page at Amazon and eBay.