I don’t know much about these condos, but I’ve seen other developments where it doesn’t take much more than a “um, yeah, sure we’re interested” to get them to put a little sold button or pin or whatever on a particular lot/unit, so I wouldn’t quite consider those units from over the weekend sold yet.
I can’t imagine the prices moving up. 18 units might not seem like a lot to you and me, but it is to them (okay, so it is to me too). The only other development I know of that actually sold out recently lowered prices with every release (and I imagine that’s what helped them sell out…)