Revo K101 Plus
An updated version of the Revo K101 Plus has gone on sale! It's the only hardware clone of the Game Boy Advance — meaning it isn't emulation with lag and slowdowns, but a properly functioning console (the only clone that actually works well!).
Besides its excellent screen and comfortable shape, the console can also connect to a TV. It supports games from several other platforms as well: GBC, GB, SMS, NES, GG, and PCE.
You can order the Revo K101 Plus on AliExpress.
Update: this AliExpress listing is no longer available.