Heh, must be time for a post from the dark side. Now, before y'all go gettin' your knickers in a knot, I trade fairly and by the given rules of whatever board happens to be the origin of the trade.
No one here has responded with respect to McFarlane sportspicks. Totally, absolutely different world. The rules of value there are governed by ebay (price/value wise). Like any other board, I'll help folks out and have had the same in return. Largely, I am now trading with guys that I know from previous trades and we try to match up as best we can. The most scandalous trade I made was a Saints Ricky Williams for 2 hockey variants

Anyone from the spawn board that hear's that trade thinks I'm nuts. Whatever.
I have also traded variant figs for multiple SW items. Typically I ask for 3 SW figs for a single variant, so I am asking $15 for $10 worth of "value". The catch is that is the way those boards work. I have yet to sell anything on ebay.
As far as chase figs like Doombot, no mask Wolverine or gold Ironman, hey, I'd buy two if I found them. Dain Bramage and I have an agreement to trade them fairly to each other to help one another out. If I found multiples, I'd grab them for other board members around here or elsewhere that I know. That seems contrary to the philosophy of many around here. I used to scoff at the thought of scalpers buying SW stuff around where I am. Ebay isn't much of a market right now nor is there locally. That was until I got into McFarlane stuff. Hell, I know the scalpers by name and I'll be damned if I'd leave something for them to drag off to the local flea market. Am I taking it away from a kid or other collector? Yep, but they can find me on multiple boards and I'll help everyone out. Can't do much about the kid, but no way a schoolkid is going to score a chase figure on a weekday. Stocking at our stores is overnight or early am, so collectors and scalpers are out en masse early.