Why are the prices of slingshots so different?

material (wood, iron, zinc alloy, stainless steel, copper, titanium alloy. Aviation aluminum. ),

manufacturing process casting, precision casting, laser cutting, wire cutting,

fine chamfering, polishing, sand blasting and wire drawing

complex traditional bow, ball bow, compound bow and advanced compound bow.

this is more or less clear. Technology and materials determine the safety factor and value.