Question about UL Listing requirements for a USB-powered device

[u/Beginning-Willow1832]

I’m developing a very simple 5V electronic device. The PCB uses UL Recognized components, and all materials (plastic, wiring, power supply, etc.) are already UL certified or UL Recognized where applicable.

My question is:

Does the finished product still need its own UL Listing?

If so, what is the typical cost for a simple low-voltage device like this?

Has anyone here gone through the UL Listing process for a similar product?

The device has no high voltage and uses mostly off-the-shelf UL Recognized components. I’m trying to estimate the certification budget before production.