newegg via eBay offers the refurbished, de-branded HP 23" 1080p Widescreen LCD Monitor, model no. TSS-23S31, for $129.99 with free shipping. That's the lowest total price we could find and the best deal we've seen for a de-branded HP 23" monitor. Features include a 1920x1080p native resolution, 15,000:1 dynamic contrast ratio, 5ms response rate, and DVI input.

A 90-day warranty applies, although it's unclear who backs it.