Walmart.com has 48" Samsung UN48JU6400 4K Smart LED HDTV on sale for $499.99 (price reflected in cart). Shipping is free, otherwise free store pickup is also available if stock permits.

Additionally, if you scroll down to Buy Together & Save, you may bundle a Samsung HW-JM25/ZA Bluetooth Soundbar w/ the TV for just $12 more ($511.98 total). Thanks schmante

Specs:

• Resolution: 3840 x 2160
• Refresh Rate: 60Hz (Native), 120 (Motion Rate)
• WiFi Smart TV
• Inputs:
  • 3x HDMI
  • 2x USB
  • 1x Network
  • 1x Component
  • 1x Composite
  • 2x Audio
  • 1x Serial
  • 1x Digital Audio