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Toshiba 50LF621U21 50-inch Smart 4K UHD with Dolby Vision

Toshiba 50LF621U21 50-inch Smart 4K UHD with Dolby Vision

Best price now

$380.00at MercariObserved Nov 9, 2026, 12:45 PM

Compared across 2 stores. Prices are checked against each store and labelled with when.

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Price facts

  • Lowest price today: $380.00 at Mercari (checked Nov 9, 2026).
  • Checked at 2 stores.

Our take on the Toshiba 50LF621U21 50-inch Smart 4K UHD with Dolby Vision

The Toshiba 50LF621U21 is a 50-inch 4K LED TV built around Amazon's Fire TV platform, with Dolby Vision HDR, three HDMI ports and Alexa voice control through the remote. It is a budget set aimed at buyers who want a big 4K screen with built-in streaming and no extra streaming box. Picture quality is decent for the class but not a match for brighter, better-processing rivals, and the 60 Hz panel and 89-degree viewing angle limit it for wide seating and fast action. Owners generally like the Fire TV interface and the value, while reviewers flag average contrast, modest brightness and slow smart-TV navigation as the main compromises.

Best forBudget buyers wanting a 50-inch 4K TVAmazon households already using Alexa and Fire TVSecondary rooms, bedrooms and dormsStreaming-first viewers who skip cable boxes
Pros
  • Fire TV built in, with Netflix, Prime Video, Disney+, Hulu, YouTube and Apple TV+ ready to go
  • Dolby Vision HDR support, uncommon at this tier
  • Three HDMI ports plus USB and optical audio
  • Alexa voice control through the remote
  • Simple setup for Amazon accounts
Cons
  • 60 Hz panel with no motion smoothing for sports and fast games
  • 89-degree viewing angle means color and contrast fade off-center
  • Peak brightness is modest, so HDR highlights look muted
  • Smart interface can feel sluggish on this hardware
  • Only 3 HDMI ports, one fewer than some rivals

Toshiba 50LF621U21 50-inch Smart 4K UHD with Dolby Vision prices at every store

  • MercariNew

    In stock

    $380.00Free shippingObserved Nov 9, 2026, 12:45 PM
    Visit Mercari
  • eBayPre-owned

    Availability unknown

    $200.00+ $53.00 shippingObserved Nov 9, 2026, 12:45 PM
    Visit eBay

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Toshiba 50LF621U21 50-inch Smart 4K UHD with Dolby Vision price history

Lowest price we've seen: $380.00 on Nov 9 at Mercari. Tracked across 1 store since Nov 9.

What reviewers say

Owners and reviewers treat this as a solid entry-level 4K set: the Fire TV software and Dolby Vision support get credit, while picture brightness, black levels and off-angle viewing draw complaints. Most say it is good for the money as a secondary TV, not a home-theater centerpiece.

What people mention
  • Picture qualityMixedReviewers call the 4K image sharp for the class but say contrast and black levels are only average.
  • BrightnessCriticisedOwners report the panel is dim, so Dolby Vision HDR highlights look muted.
  • Viewing angleCriticisedColor and contrast fade when watching from the side, matching the narrow rated angle.
  • Fire TV softwarePraisedUsers like having streaming apps and Alexa built in without an extra device.
  • SpeedCriticisedSome owners find the interface and app loading sluggish.
  • SetupPraisedBuyers say getting it running with an Amazon account is quick and simple.

From Mercari

  • 50" Class LED Smart 4K UHD TV
  • 2160p resolution
  • HDR
  • Fire TV Edition
Sizes
50"
Shipping
Free shipping from Texas.

About the Toshiba 50LF621U21 50-inch Smart 4K UHD with Dolby Vision

Toshiba - 50" Class - LED - 2160p - Smart - 4K UHD TV with HDR - Fire TV Edition

Specifications

Resolution
3840 x 2160
CEC Enabled
Yes
High Definition
Yes
HDTV Format
4K
Color
Black
Screen Form
Flat
Display Type
LED
Assistant Support

Questions and answers

Is Dolby Vision worth having on this TV?
It supports Dolby Vision, but the panel's modest brightness limits how much HDR adds. You get the format, not a dramatic HDR upgrade.
Is 60 Hz enough for sports and gaming?
For casual viewing, yes. Fast sports and console gaming show more motion blur than 120 Hz sets, and there is no variable refresh rate.
Can I use it without an Amazon account?
You can watch over-the-air or HDMI sources, but the Fire TV smart features and app setup expect an Amazon account.
How many devices can I plug in?
There are three HDMI ports, one USB port and an optical audio output, enough for a console, a streaming stick and a soundbar.
Does it work with Alexa?
Yes. The included voice remote has Alexa, and you can pair it with other Alexa devices for voice control.
Is it good as a main living-room TV?
It suits bedrooms and secondary rooms better. For a bright main room, a set with higher brightness and wider viewing angles is a better fit.
Where is the Toshiba 50LF621U21 50-inch Smart 4K UHD with Dolby Vision cheapest?
At Mercari, for $380.00, as of our latest check.
Where can I buy the Toshiba 50LF621U21 50-inch Smart 4K UHD with Dolby Vision?
2 stores we checked sell it, including eBay, Mercari.

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Amazon Alexa
HDR
Yes
Refresh Rate
60 Hz
Connectivity
Wi-Fi, USB, HDMI, Optical Audio
Supported Streaming Services
Hulu, Netflix, Prime Video, YouTube, HBO, Disney+, Apple TV+
With V-Chip
Yes
Screen Size
50 inches
HDMI Ports
3 HDMI ports
Viewing Angle
89° viewing angle