The Product Information filter allows users to filter for price ranges & stock quantity:

Sorting by Current Price in Zeal ranks listings by how far their price deviates from the expected average for that product—not by the raw dollar amount.
If you sort by Current Price, Zeal sorts based on the delta:
Listing B (–55%) → MOST suspicious
Listing A (–10%)
Listing C (+10%)
For example, even though $900 is not the lowest price of all Gucci items the system ever sees, it is the most abnormally low compared to the expected price for this specific product — and therefore rises to the top.