Thank you all for the replies; it is illuminating to both to see numbers and hear the general terms of how others perform their tasks.
I am referring to profit; my present system is converter roulette, but with specific parameters set to minimize time spent and maximize effective profit. For the most part, my efforts have been focused on reducing the number of decisions I need make during the process, which has *significantly* improved my rate of inf acquisition.
From this, it seems worthwhile to try to find a "market niche" to invest in for a while- though I have my doubts as to how well that approach lends itself to mass retail.
I appreciate the interest, and wish everyone good luck.