Well they already just did introduced a new way to get items, and that's speed-up tokens. You'll be able to produce commercial items 2/4/12x faster than usual. You can't get these speed-up tokens until you're at least level 24 though.
There are some items which are supposed to be harder to get, such as storage/land expansion. Tips for getting these: Have lots of friends, especially higher level like myself (all my land/storage is maxed). Quite often i'm adding those to my trade depot and I don't advertise until i'm full (plenty of time for friends to visit and buy first).
You're not supposed to be able to expand so fast, but ultimately it's best to concentrate on storage expansion first.
The biggest tip I can give you for shopping on GTHQ: use a fast device, like an iPhone6 or iPad Air2. The load time is so much faster than old devices, so you have a much higher chance of getting items before others do.