https://www.pcgamer.com/steam-link-is-on-sale-for-just-dollar250/

If you've been on the fence about picking up a Steam Link to stream your Steam catalog to your TV, maybe today's sale price will be the deciding factor. Valve is selling it for just $2.50 on Steam today.

That's about as cheap as it gets without just giving the thing away for free. Unfortunately, Valve won't ship it for free—you have to pay an extra $7.99 for shipping, which is more than twice the cost of the Steam Link. However, that brings the tally to a still reasonable $10.49, making it far cheaper than its $49.99 list price.