Dealathon via Amazon offers Prime members the Capello 1080p DVD Player, model no. CVD2216BLK, for $19.50 with free shipping. (Non-members can spend $35 to bag free shipping; otherwise, it adds $8.39.) That's the lowest total price we could find by $10. It features a 1920x1080 native resolution (1080p), HDMI, and remote control.
A close price: Legend Micro via eBay offers it with an open box for $19.99 with free shipping.