IMHO, it seems extremely unlikely that Del Mar will very fall much at all. It’s a contained region with a small amount of inventory, demand is high, and likely to remain so for the foreseeable future, and most seller’s are not likely to be in distress. This isn’t a recipe for wholesale price drops.
Del Mar may not increase for some time to come, but it’s hard to imagine well-heeled sellers sacrificing their homes at fire sale prices unless they absolutely positively have to, and how many of those will there be?