When it comes to GPUs, NVIDIA’s GeForce GTX 10-series have made it possible for manufacturers to trim down the overall size of gaming laptops without sacrificing features like battery life, making them powerful and portable. AMD's also basically non-existent in the mobile space these days too, so if you're shopping for a cheap gaming laptop you're probably getting one with an Nvidia GPU under the hood.
These days, manufacturers have expanded their product offering to include more lightweight and affordable computers that have been optimized to run on battery power for longer periods of time. Nvidia and Intel have been very successful when it comes to reducing the cost of their hardware components whereas AMD has not really been able to gain much of a foothold in the gaming laptop market (or in the desktop gaming computer market for that matter). Nowadays, it is entirely possible to purchase a very decent gaming laptop (equipped with a GeForce GTX 1050 Ti graphics chip and a Core i7 processor) capable of running games in Full HD for around 800 dollars.
Dell Home, via its Member Purchase Program, offers its Dell 15.6" Laptop Gaming Backpack in Black/Red for $28.49 with free shipping. That's tied with our expired mention from four days ago as the lowest price we've seen for this bag. (It's the best deal we could find now by $20.) It accommodates laptops with up to 15.6" screens and features a shock-absorbent EVA molded front shield, adjustable shoulder straps, and a deployable rain cover.