The standard guys are $12 shipped here on the org. That's what I have been paying for them (buying in lots).
Variants like smash blade might be a little less, maybe $10.
More desirable figures like adam or Teela are somewhere between $15 and $20.
I have spent about $230 from sellers on the org. I have somewhere around 15 figures. Sorry, I'm too lazy to count them.
Well, the average was around $12 per figure. I have all the guys you have except for the variants (which I don't want, frankly) and mek-a-neck.