I found out that the cost for these (what I'm assuming to be garden statues) ranges from R180 for the large, more detailed birds at the back, to R150 for the large, but less detailed ones in the second-last row. The price decreases along with the size of the bird, all the way down to R50 for ones about the size of a shoe-box.
As with the tyre-swings, you'll find this stand just up the road from the Stodels Nursery in Bellville.