Understand how BDB works, what the numbers mean, why deals are surfaced, and what you get with a free account.
Last updated 2026-09-30
A site that tracks real price history for a curated set of premium products and surfaces the ones currently priced well below their own recent history.
BDB monitors a curated list of approved brands and categories through scheduled discovery cycles, tracks their real price history over time, and flags products whose current price has dropped meaningfully below their own recent average.
BDB currently serves the US and UK markets. The US experience is available at bigdealbunker.com, while the UK experience is available at bigdealbunker.com/uk. Each regional experience uses its own market's prices and price history.
No. Browsing BDB's deals needs no account at all. An account adds tools on top of that -- see the next question.
You don't need an account to browse BDB. A free account gives you tools that make BDB work for you -- Deal Alerts, Deal Finder, Ranked Deals, and the Deal Feed. Instead of checking BDB manually, you can tell it what you're interested in and let it surface deals that match. Browsing is free. Creating an account is free.
No. Creating a BDB account is free -- there's no subscription and no credit card required.
Browsing deals and opening an Opportunity Analysis don't require an account -- those are free to everyone. Deal Finder, Deal Alerts, Ranked Deals, and the Deal Feed do require signing in, since they're personalized to the categories, brands, and price criteria you choose. Sign-in is free, doesn't require a credit card, and uses a one-time code sent to your email rather than a password.
A way to get notified when a product matching criteria you set (category, brand, price range, how far below its own average) becomes a BDB Deal.
BDB checks for new deals on its scheduled discovery cycles. When a new deal matches your alert, BDB can notify you As Found or include it in your Daily Summary.
No. BDB is not a real-time price-monitoring service. "As Found" means BDB notifies you as matching deals are discovered during its scheduled monitoring, with matching events potentially consolidated into a single notification.
It has to clear several real, checked criteria: the brand and category are ones BDB has approved for tracking; the price has real, sufficient history behind it (not just a single snapshot); the current price is at least a meaningful percentage below that history; and the listing is new rather than refurbished, renewed, or used.
BDB only tracks a curated set of approved brands and categories, and requires real, sustained price history behind a claim before it counts -- not every discounted product meets that bar.
Two reasons: the price recovered and is no longer meaningfully below its own 90-day average, or BDB can no longer find or verify the listing (delisted, long-term out of stock, or no longer matching BDB's tracking criteria).
The position a deal holds when every BDB Deal is ordered by its BDB Score -- #1 is the strongest deal by that measure, #2 the next, and so on.
BDB Score reflects the strength of a deal based on historically supported price evidence -- how much lower the current price is than what BDB has actually verified for that product over time. BDB Rank is the resulting order once every deal is sorted by that score.
No. BDB Rank reflects deal strength against a product's own price history -- not a claim that one product is inherently better than another, and not an endorsement.
The current price BDB is tracking for this product right now.
The average price BDB has tracked for this product over the last 90 days.
How far the current price sits below the product's own 90D AVG, as a percentage. This is BDB's primary evidence that something is a real deal -- a real, tracked comparison against the product's own price history, evaluated independently rather than taken from a discount label.
The lowest price BDB has recorded during the available pricing history. This is the lowest price since BDB started tracking this specific product -- not a claim about its entire lifetime on Amazon, and not a claim about the lowest price anywhere on the internet.
List Price is also commonly referred to as MSRP. It may be supplied by a manufacturer, supplier, or seller and may not reflect the prevailing market price. BDB does not independently verify it.
Yes -- List Price is also commonly referred to as MSRP. BDB uses "List Price" because it doesn't imply BDB has independently verified the figure as manufacturer-set.
They come from different places. 90D AVG is a real, tracked average of what this product has actually sold for over the last 90 days. List Price is a reference figure the retailer displays -- not independently verified, and not necessarily reflective of real recent selling prices. BDB leads with 90D AVG because it's the one BDB has actually verified.
So "this is a good price" is a real, checked comparison against how this product has actually been priced recently -- not a guess based on a single snapshot.
A newly-listed product hasn't been tracked long enough yet for BDB to be confident its recent pricing reflects genuine, ongoing behavior rather than a temporary launch price. BDB waits until there's enough real history before treating a price drop as meaningful.
No. BDB LOW reflects BDB's own tracked history for that specific product, not a live comparison against every retailer or every price ever charged anywhere.
No. BDB doesn't sell anything directly -- it links out to the retailer, where the purchase happens.
On the retailer's own site, such as Amazon, not on Big Deal Bunker.
BDB participates in the Amazon Associates Program and may earn a commission on purchases made after following a BDB link, at no additional cost to the customer.
No. Big Deal Bunker is an independent site. It participates in the Amazon Associates Program as an affiliate, which is a commercial relationship, not ownership, partnership, or official endorsement by Amazon.
No. Affiliate relationships play no role in which products are discovered, which deals qualify, how they're ranked, or how they're presented. Commission rates have no bearing on qualification.
Have another question? Contact us. For how BDB is funded, see our Affiliate Disclosure.