just got a untradable wrath of ka (necrophos) which i already have it, any idea to possible change with other sets with anyone?

yea, but dunno where to find any trader want non-marketable set

THere are ppl buying/selling Exalted SF, but in a very slow rate:

Buyers mindset:

1. SF very cool
2. After watched Sumail's EUL build SF, tot its a sure fire way to OWN non-escape.
3. Most of the SF user want to take a shortcut to pro-SF after equipping SF arcana
4. Sumail's SF build or whatever SF build, is very difficult to pull off, not because of the combo, its the hero's tier difficulty to master
5. Eventually those SF users will realize point 4 and lose interest, except those SF lovers.
6. Thus those disillusioned SF users/wannabe are selling SF arcana on steam market.

Side-note: If you manage to pull off multiple 3 Shadowraze combo(3 raze on same hero) in 1 game, your SF is ready for tourney already...

For normal SF:

1. There are buyers now selling normal SF arcana, but very little, can see less than 5 of them
2. Most dota 2 traders still have the mindset of Exalted > Standard because limited period, regardless the actual no. of the Arcana on market
3. Thus, rarely got ppl buy the Normal SF arcana.

To me, I more concerned about whether its CLEAN or not(yea I am 1 of the OCD-Trader), than the mere Exalted Tag.

Without Exalted Tag => I can customize my arcana into Corrupted since the 3 Shadowraze combo inscribed gem is pretty useless anyway.

Well Valve mistake or not, it still doesnt change the fact that SF is much less sought after among players/traders due to the hero's difficulty/complexity nature to start/master with

no. of arcanas exist so far:(estimation from non-private inventory detected)

PA => 19k
Lina => 15k
LC => 15k
TB =>7.5k
SF => 5.5k Exalted (normal version unknown and only released not long ago)
techies => 2.5k
CM => ???

PA arcana is released much later than SF & techies, but SF and techies cant even achieve half of the PA arcana in numbers.

Arcana coolness is 1 thing, after the hype, common players/traders will start to realize painfully how hard/easy actually to use some arcana heroes.

how come no one buys non exalted sf arcana ?

Don't worry, when Volvo release new hats, all these immortal price will crash, see their numbers in market...