Price is not always used as a balance factor, nor does it necessarily indicate power. I very much doubt it's a mistake.

On 3/16/2020 at 4:24 PM, NicoDavout said:

Longeing Whip costs 600 credits, the price is an absurd. . There are dozens of better Melee weapons that cost cheaper or blasters. Does anyone know if there was some kind of errata about this item?

Just as in real life, a high pice and greater effectiveness are not necessarily linked.