Maybe this breaks the first and second rule of fight club... but I wonder if it would be possible to establish some standard metrics for thrifting. eg:
-hot streak (store visits per single item with over $100 profit at market)
-grind value (store visits per item with any flippable value)
-sunk cost per visit (gas, time, etc) over net sales
-some way to calculate which stores or neighborhoods are most likely to yeild
At this point I only really buy stuff I need for...