Discgolfcenter.com apparently hasn't gotten the McBeth Star Destroyers back in stock again yet following the Destroyer market crash(explosion?) of 11/31/18, but their stated price for this commodity has gone from $13.99 to $15.99. We may be seeing the beginning of an inflationary trend.
They can still be found cheaper. I'm looking at one on eBay, brand new, $15 shipped.
Obviously you always have the option to overpay, but I think the floor of the market will remain static at least into spring of 2019. (If you know where to look.) Eventually when the current "stock" sells out at most non-collector stores, then they will be truly OOP and the base prices will rise.