The "Buy Queue" is an interesting suggestion, but it seems based on the idea that the Global Market problem is due to competition for resources, that there is a shortage of certain items and that is why we have trouble getting them. Sadly, this is not what is going on here.
The real problem is that after you have built your city a certain amount, the items you "need" to progress are DENIED you. There is an active FILTER on the Market so that you CANNOT get the items you need. When I open the Market I usually hear voices chanting "We're saving it for an emergency" and no matter what items I currently need they are almost always not listed, and when they are listed and I visit that city, they are usually not shown in that city's panel, and when they are shown in that city's panel and I tap them, there is usually a delay and then the error message about not being available.
Sometimes, obviously, this could be due to the item being obtained by someone else. But there is an unusually large number of items being listed that I don't currently need, items I am able to get if I care to acquire them for later use. Those items are never suddenly unavailable (obtained by someone else). It's only the items I actually need right now that are denied me. We can't all be needing the same items simultaneously. My needs vary as hours and days go by, and it is ALWAYS what I need that is missing.
EA's policy seems to be all about creating a frustrating experience that will encourage people to spend real cash to progress. They won't stop doing that to provide a "Buy Queue" unless the queue is designed to choke as badly as the Market.
