Pos/Neg Battery Cables

I want to buy a new set of cables for my BB Barracuda. The problem is the prices are ridiculous.

I've looked at many different cables for many different body types, years, small blocks/big blocks, etc. - What is the difference exactly?

I can't see spending $180 for a positive cable for my car, when a 73' small block cable is 1/3 the price- and they appear to be the exact same thing!