To be fair - once you managed to find what you are looking for on the DanKung webssite - the ordering process and shipping (Free, or rather included) are very good. Also they do respond well to emails.
The pricing increases seem to be general to China currently - noticed in the last few months everything coming out of there is becoming more costly.
But as an example - I've ordered a few X6 POM's - which I have usually paid $12 each for, now retail at $17.
Dankung slingshots, albeit that they are reliable products, are a shade expensive in my opinion. I prefer Piao Yu at Aliexpress these days.
On that note, this looks like a bargain version of the so-called "Heaven Emperor" slingshot:
https://www.aliexpress.com/item/4000823176857.html?spm=2114.12010612.8148356.30.15463a70kQXLYR
