guys...
don't forget that you can seperate each of the arrows. thus, EACH special poison arrow sells for 5,500 gold (x197). there is no need what-so-ever to try and sell ALL items at once.
additionally, i have at least 2 million gold worth of other arrows, just under 400,000 gold and another 400,000 to 1 million stuffed in barrels.
and i've also bought/sold skills at least 10 times.
my guess is that i'll continue to find more and better arrows and other stuff too as i'm just now into act II.
gold is the LEAST problem i'd assume.