Potential Octavia owners beware !!
To be honest the lower resale did put me off purchasing a new Skoda. There are often some pretty keen deals getting done on old stock/models. This obviously doesn't help the resale price when cars are getting discount $10-15k off the sticker price to shift them when the new model comes through. This is the same thing Hyundai used to do (massive discounts on old models) and it killed resale.
Having said that when I was looking around for a new work car a couple of months back it seemed the diesel RS's didn't seem to have nearly as good a resale as the petrol variants. It must be some sort of Skoda RS anomaly that the diesels depreciate quicker. Usually it's the other way around.