If you want a discrete GPU with the same featureset as a modern integrated Intel GPU - with basic desktop features such as 1) being able to decode modern video

If you want a discrete GPU with the same featureset as a modern integrated Intel GPU - with basic desktop features such as 1) being able to decode modern video codecs like HEVC 2) prime Windows and (especially) Linux support or 3) modern video outputs such as HDMI 2.0 - you need to buy a Radeon RX550. This will still set you back more than $80 and add another fan to your build. A Radeon R7 240 from 6 years ago will still set you back $50, but will not give you modern video outputs or video codecs (although it at least still has relatively prime driver support). It's probably even slower than Intel's current integrated graphics too. Might as well go for the upsell then. The prevalence of internal GPUs unfortunately seems to have killed the market for up-to-date very low end discrete GPUs. The "budget stuff" starts at $80, which is quite steep for something that barely has added value over an integrated GPU.