i wanted to take some sp from my shop but not all of it
Vampire_Knight
Nope, it's been rejected before because it makes the keeping sP in your till achievements to easy.
Use your vault to store away a set amount of sP, not the till.
No, the shop till achievement is hard for that reason. If you're saving up for it, but need a bit more on hand sP, start a new shop and throw a few items in there.

stated that this is unlikely as it removes from the difficulty of some achievements and makes it more difficult to calculate where sP is on the site. Source: Keith Answers PORT PLUNDAH (2:00)