Abstract: A case 1 of conventional appearance, fastened by adhesive tape around its parting line and having a carrying handle 2 can be opened, emptied of contents including a number of like lengths of wood 3 (for example) capable of being assembled into a single support post, and folded inside-out to show a pre-printed advertising sign 21 of professional appearance for support by the post to facilitate sale of a house by the owner-occupier. Other useful adjuncts to such a fabrication (such as adhesive, wire, gloves, adhesive tape, nuts and bolts) or for such a transaction (booklets, leaflets, stickers, labels, check-lists) can also be incorporated in the kit. In a variant, not shown, the post sections are grooved at the ends, and the topmost is grooved along one face, so that (a) the end grooves jointly and the face groove individually trap inwardly turned margins around the case of (b) the face groove traps an outwardly turned margin along one edge of the supported sign.