I'm not sure if you remember the restock wars before they were taken away. They usually CRASHED the servers because of people mass restocking to get those R45+ items all at the same time and during specific times. This was when the site still had typed in codes that had to be entered before an item could be purchased.
It's not an option now, hasn't been for a while, but allowing people to mass buy an item at the same time would devastate the site servers. It's done so before. I couldn't imagine what would happen if the site purchasing time limit was taken away and people were allowed to mass buy all at once. They already can, and really, restocking should not be relegated to those who have the fastest connection and can mass buy items all at once.
This would taken away any slight weakness that high restockers who mass buy items have, because they'd be the ones buying up all the items and they already do. People with slower connections who can't mass stock large items would honestly be out of luck.
That explains how some people bought 15,000-30,000 crystals from my shop. (I can't believe anyone would stay awake for 10 consecutive hours buying multiples).
Can't you just cntrl+click multiple shops in your case though?
That was probably me buying a few thousand when they were low enough. You can press F5 (refresh) and enter really fast. Since it isn't against the rules, because it isn't a glitch or anything, just a really fast way for those with fast fingers (or reflexes i guess?) haha.
You can do the whole CNTRL+Click, but that's only if a few shops have items in the price range you want. If not, as stated above, you can just f5 and enter on the items buy page. ^-^
♥ [flower=owl] ♥