The cheapest headline price is not always the cheapest purchase. For the same product, compare what arrives at the door and the conditions attached to the order.
The four-line comparison
Record the item price, delivery, taxes or surcharges and the return or warranty position. Then record whether the listing is sold by the retailer, fulfilled by the retailer or supplied by an independent seller.
Amazon is often a fulfilment question
Check the exact model, seller, dispatch estimate, membership condition and return terms. Marketplace listings can differ even when the product title looks identical. Prime or subscription benefits should be counted only when the shopper already has them or genuinely wants them.
eBay is often a seller-and-condition question
Check the seller’s recent feedback, item condition, dispatch location, postage, returns and included accessories. A refurbished or used listing may be good value, but it should not be compared with a new item as if the risk were identical.
ShopBack belongs after the comparison
If the retailer is available through ShopBack, check the current cashback page and exclusions. Cashback is normally tied to the final click path, so do not describe an Amazon or eBay affiliate click and a ShopBack click as two guaranteed earnings or two guaranteed savings.
Vyonetix’s landed-cost score
- Product match: exact model and condition.
- Delivered price: realistic total, not the headline.
- Seller confidence: fulfilment, feedback and dispatch clarity.
- Exit safety: returns, warranty and buyer protection.
- Optional cashback: current, eligible and tracked.
The best deal is the highest-confidence saving, not necessarily the lowest number on the page. Check the live retailer page before buying.