ba@, that's just it. ayncaps don't believe what you're describing is so-called true capitalism. True markets arise out of human relation as 'naturally' taking a banana from under those lush leaves, shining it, and putting a price on it while attempting to describe its scents and collage of tastes in way which will make the mouth water. Of course, one could take a banana from another tree, but alas, now there's fences around them and banana-shining has become a valued service, etc, etc.
funky@, brick and mortar markets, to me, within context of civilized living, seem much better in terms of free choice and movement with slightly less alienation in comparison to electronic so-called markets. Going somewhere to barter or purchase something may entail some nosy busybody snooping into your affairs, but electronic markets do the same with godknowswhoandwhy in far more detail.
all in all i agree with ingrate and rs666 that actual markets arose out of human (i'd say here, complex) behavior/activity and became increasingly complicated over time and based on numerous factors: nation-states, global empires, colonialism, modern science, globalized slavery, etc. civilization in general and capitalism (perhaps civilization's most 'efficient' expression) have a way of transmuting complex ('natural') activity into far more complicated methods of manipulation and control. here i'm thinking of the more-or-less natural desire to engage and learn about our world and turning it into schooling, all the while the powers that be equate the two, rendering them synonymous activities.