Low quantity items tend to fluctuate more than high quantity items. It's probably just because we don't have an operation going and I think Cache/Cobblestone/Overpass aren't making a return in the next operation, and that's what I think others are thinking as well, so they just buy instead of paying huge later.

Also, if CN CSGO share the skin market with us, then dlore price will be disastrous.

There are two ways this is going,

1) If CN CSGO share the skin market with us, and Cobblestone collection isn't making a return, price will skyrocket. This color combo from Dlore is overkill for Chinese, imagine Tyloo make it to next valve sponsored major and got a sticker for themselves and you use it on the dlore even though the Tyloo logo isn't a dragon.

2) If CN CSGO doesn't share the skin market with us, and Cache/Cobblestone/Overpass being added to the common drop table, then rip price. This isn't totally impossible, as the current common drop list has been there since 2013 November, (Dust 2, Train, Safehouse, Italy, Bank, Lake). You see valve is currently doing these redundant sound changes to "revamp" and "refresh" the game for the disappoint players from initial release in 2012. It would make sense to think it is about damn time to swap the current drop list to something else.

It is a huge gamble, for you to guess which is the likely one to happen.