Looks like it's between ?56/$72 and ?75/$96 for the console (excluding the Pi) depending on the level of assembly you want to do. Full unit with a Pi 3B and 32gb Micro SD is ?141/$180.
Can buy a new GPD XD for that so it's a no from me.
GPD Win, GPD XD 64gb, Pap KIII-Plus, RS-97, RS-90, New Bittboy, 3DS XL, DSi XL, GBA SP, GBBC Clone, Gameboy Pocket, PSP Go,
HP Envy M6, Acer 522, Dell Mini 9
Psion 5 & 5MX
Tons of other old laptops and tablets.....