coz dac popularize sf..now ppl wan use sf arcana and not selling it..tats y price shot up high i guess..

when new things come out and during events, all price will drop because everyone is selling their items cheap to buy the new things. so 

SF arcana sudden price spike just temporary only because:

1. Everyone know SF arcana is very cool

2. BUT not everyone able to use SF until not to feed(SF is very hard to master due to unforgiving penalty), let alone to fully master it till winning it consistently.

3. When SF owner himself not a good SF player, eventually all the lost matches will make the owner/trader himself give up for keeping the arcana, and thus use the arcana in trading.

4. Demand eventually will goes down due to the (3) mentioned.

5. Finally the market price of arcana will be depend on how much the collector wanna to keep it without using it in game/trading, and the rarity in market.

6. But as for any arcana, its price wont be over RM140 due to store price.
Recent example: PA arcana

1. So far you can find lvl 3 PA at RM65-RM70 from desparate sellers, for normal price it would be RM80 onwards.

2. Even at the score of 75-80+, a player still have to win 15-20 games with PA in order to achieve lvl 3 effect.

3. So only the only true PA/carry player will keep on playing till fully unlock the arcana

4. I heard some rumors that selectable style features will be added to PA arcana, so its price will be rise again in the future.
Side note: For now, I rugi like RM50-RM70 X 7 PA arcana => RM490 max due to wrong estimation of the PA arcana max price months ago.

Facebook Trading Pages