Great Brands via eBay offers the Wagner Spraytech Power Steamer and Cleaner, model no. 915, for $80.89 with free shipping. Outside of the mentions below, that's the lowest total price we could find by $4, although most retailers charge at least $100. It purports to remove wallpaper 20% faster than non-powered steamers and features an 8-foot steam hose, two extension tubes, utility brushes, window/tile squeegee, and floor cleaning head.
A close price: Walmart and Amazon both offer it for $81.99 with free shipping.