To answer a recent question here are a couple of pictures of the storage system I used for my figures. The basic tray is the top from A4 paper boxes, the sort that hold about 6 reams. I cut them down to a suitable height for the figures and then add a couple of partitions (usually I split the tray into 3 equal sized areas). The partitions also ensurse that the trays don't collapse into each other.
The trays then fit neatly inside a folding stackable plastic box (most of mine come from Tesco). Depending on the tray height either 6 or 8 trays fit each box