!rant
Cheap laptops for running Kali/Arch? Will be used for learning penetration testing.

Was thinking an older Lenovo Thinkpad or something like that?

@Artemix thanks! I was definitely considering Arch as it's a lot less bloated. Cheers for confirming my suspicions :)

I understand Arch is very lightweight, so I shouldn't need a super powerful machine, right? Obviously if I'm running brute force password attacks having a slower machine will impede me, but aside from that do you reckon I should be alright with a mid-spec machine?