Product identity and trust
Why is the same perfume cheaper online
A lower online price can reflect a different size, version, condition, seller or offer. Confirm that the products really match before interpreting the difference; cheapness alone proves neither a bargain nor counterfeiting.
A HUME Fragrance buying guide

Match the exact variant
Check maker, fragrance version, concentration label and millilitres. A reference image may show a different option.
Compare complete totals
Include delivery and applicable charges consistently. Do not compare one checkout total with another headline price.
Read the seller explanation
Unboxed, preorder and other conditions can matter. Do not invent a supply-chain reason the seller has not substantiated.
Try this before you buy
Create two matching product-identity rows before deciding whether an online price is genuinely lower.