Retro portable console

What is now possible to buy a portable retro console?, to start her games from NES to PS1. Maybe someone around here and You will be able to advise something sensible.
Liked such portativki, maybe there's something better?
СпойлерRS-97

СпойлерBittBoy-Version3

СпойлерLDK

PSP does not offer, used not buying.