Hardware for a home gaming platform

What ready to use the hardware we have now can be used as a base for home gaming platform runs on native Linux?

I think about some box in formfactor of old console computers like ZX Spectrum with embedded keyboard, mixes gaming and utility capabilities.

Maybe some hardware kits already available for a very few prices, with hardware has full support for Linux including hardware graphics?

I'm not targeting on concurrency with top-level game consoles, but especially focus on low-end side compares with old-style 16- and 8-bit games and pure native Linux development.

As a sample, it should be like Sony PS Classic with keyboard and Open Hardware sells lower than $50 as a ready to use hardware kit.

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