Intel NUCs are pretty neat
That under primitive conditions men lived and live by barter"
The basic premise, that barter was (and is) by which 'primitive' (whatever that is) live, has been thoroughly debunked by contemporary anthropologists of money. David Graeber's 'Debt: The first 5000 years" is a must read for anyone interested in the topic of theory of money from the anthroological (i.e., empirical) perspective: