I'll post some fair, regular price for some of the items on the market, atm. Sure, over time they may change...

Key 300 fg
Random modifier 150-200 fg
BB (battle bonus) 150
Crap rare 100-150 fg (list is too long)
Semi crap rare (wuldastron and every other random rare around 2 keys in shop) 300-400 fg

Sets:

Commander set 5-6 keys (w/o weapon)
Ebony set 3
Alpine set 50-55
Iron bear 1.5-2
Magnus 3-4
Demon blood 3-4
Master assasin (new BH) 3-4 keys

Couriers:

Demon5-6
Frog5
Tegu3-4
Wardog3
Boar, morok 2
Stumpy1-2

Unusuals:
http://www.playdota.com/forums/showthread.php?t=996518&highlight=price+list
http://www.reddit.com/r/Dota2Trade/comments/z340l/psaprice_list_for_dota_2_unusual_couriers_version/

Random items:
20-30 random common = key
7-10 random uncommon = key
Better commons = 50-80 (u can easily get nice uncommon + random common for EUL, for example)
Better uncommons = 100-250
Odachi, rattlebite, wuldastron = 1
Ward, ice tiny, squiddle, vice, PA rare, SS mega kill, demigod = 1.5-2
Dendro, flail = 2
Hook = 4-5
Time breaker = 5-6

Random strange common = 50-80
Random strange uncommon = 100-250
---
So, ask your questions here regarding price of items or just throw rocks at me.
Cheers for reading,

why there is no "yes" in the poll? I think it's a good idea, don't think so bad about your thread

Not a bad thread, but I see Odachi and the rares listed below it go for more.

Also, will buy Master Assassin's set for 3 keys if anyone has. Or for 6x 3-day Battle bonus.

Ahhhh... it is hidden under option 1 (or 6, which I voted)

I see odachi and wulda quite often for 1 key.
But I do agree, odachi should be 1 key + sweets...most of these items can be bought for a key or two less + sweets (2x NICE uncommons etc)

can you list some nice uncommons? aside from rawhide, i'm not sure what else are considered good.

This post was edited by donkey_kart on Sep 26 2012 01:52pm

Raw hide, Ebony bracer, Champion of emauracus, S&Y, Axe demon uncommons, invoker, BH mask & tails, ogre weapon (this is personal, not so sure about market), Skele sword, Sven sword (fork), ursa 2x new skull, tide wheel&flag, sven cape and basically, each uncommon worth more than 2€ in shop but NOT WD and not the ones that are not part of any sets (but there are some exceptions like NP and omni helm mentioned in the beginning)...

Use common sense:

1) can it be seen easily in game? does it catch your eye the instant you see it?
2) how many other items of the same type for that hero are available? For example, there are so many common sven weapons that anything below demigod, fork or rulling sword is just lol to have
3) how many players play that hero? We all love sven, right? .... NOT Ursa? GTFO with that hero.... I have hard time to sell ravager set on this forum for 700 fg... and it should be worth 4 keys in game (regarding to store) but it is 3 keys

This post was edited by MrHam on Sep 26 2012 02:06pm

Uh uh... most common trading items.

Dota 2 invite: 4 keys
CS:GO 7-8 (7 + sweet, no1 trades for 8 keys - they all do 2x dota 2 invite usually or 8 keys)
Torchilight 2 10-11

General warning:

Do NOT trade for CS:GO BETA!

If it has BETA word on steam gift, do NOT accept it - it's a scam and it will not work (almost traded one, luckily my friend was online and warned me) and it is confirmed (good old google, found result instantly as a question from one forum).

This post was edited by MrHam on Sep 26 2012 02:17pm

What is the price of Emma Watson naked pictures?

Random funny picture like... you naked?