What should I look for in Rares?

[SakuraNeteru]

I stoppped looking at rares for a long time, and suddenly, through a fit of insanity, decided to just grab a few of the ones that dropped while I went through travencal and meph for the umpteenth time that day. I found a nice item:
Rare Double Axe
40% IAS
383% ED
16 to max damage
152 to AR
8-20 cold (sucks, but at least it is cold)
+7 poison damage over 3 seconds (would have rathered something like chance to cast amp)

I have been picking and IDing stuff ever since and have found a few other decent/good items, but am having some extreme difficulty in finding buyers for the items. Perhaps it is just that I figure that the damage is good enough, or that people have a hard time evaluing something that is not "normal" (runeword/unique).

I have since decided on a list of abilities that I consider "best" and will be trying to keep any that satisfy the following:
Prefix (any 3): Elysian/Hallowed (+vs demons or undead), Master's (AR+Dam), Fool's/Visionary/Grinding, Cruel.
Suffix (any 3): Leech (LL/ML), Slaughter (+max damage), Transcendence (+min damage), quickness (+40% IAS), Chance to cast Amp Damage.

What weapons would be the most valued with these mods? Axes, everyone seems to want Berzerker, but if the issue is not how many sockets it can have (since rares can only have 1 or 2), I am free to choose any weapon at all if it has enough damage over time. Would a militarypick/warspike be better damage over time than the berzerker axe at that point due to the higher speed? I am looking to see what other people would consider "high-value" in each weapon catagory, such as perhaps crystal/dimensional/phaseblade with all the above abilities.

[Evrae Altana]

For rare weapons, good ED, AR, leech, IAS, and other melee mods must be present. For rare circlets, people look for +skills, FCR, stats, and resists.

[SakuraNeteru]

Actually, meant what weapons should I look for (since I have already figured out what would be looking for). My problem is even with a rare with IAS and 380+% ED, I can't find a buyer for a rare axe.

What weapons for damage over time would be best at the 300% ED or over range? Is it worth it to look at the highest base damage, or best speed? Does it all balance out in the end even after changes due to ED?

[monte cristo]

Well, obviously the weapon must enable the owner to reach a decent IAS breakpoint for his char =) Doesn't matter if it's Frenzy, WW, Strafe, Multishot or Zeal... So at least 20IAS on the weapon is welcome, 40 is best, but the first one may be compensated if the weapon had for example 2 sockets.