Although there are some less powerful cards (the Intel A310/A380s are available for ~$100 and would be fine as basic display adapters w/ good video engines) if you go lower end, modern iGPUs are generally good enough for anything below the $200 level, hence why enthusiast sites (focused on DIY) consider that "low end" these days.
The Radeon 780M on Ryzen APUs can power 1080P gaming, and output to 3-4 4K/8K displays (the latest Intel Xe iGPUs are about on par, but generally pricier). A Ryzen 5700G goes for about $150 (or a 5600G for closer to $100), or you can get entire Ryzen 7840HS minipcs w/ 32GB RAM for $400-500).
The Radeon 780M on Ryzen APUs can power 1080P gaming, and output to 3-4 4K/8K displays (the latest Intel Xe iGPUs are about on par, but generally pricier). A Ryzen 5700G goes for about $150 (or a 5600G for closer to $100), or you can get entire Ryzen 7840HS minipcs w/ 32GB RAM for $400-500).