reef pike
I do not know how ILV systems operate, but there are issues with the marketplace not having access to up to date data. If an action cannot complete immediately we receive IMX and other errors. A queue that can be seen from a rotating wheel icon (or similar) of processes would be great. The OW Forge seems like it had to implement something similar.
Anyway... Currently if I want to buy 1 of something I queue up about 4x of whatever item into my cart, and then purchase by skipping the troublesome entries (already bought, or other reason to decline the sale) and hoping 1 or 2 items get bought.