Guides
Our flagship guide is free for everyone. Plus, Pro, and First Edition subscribers get the full guide archive. See membership tiers.
BidDown vs. eBay: Fees, Format, and Which One Fits You
eBay is a forward auction: the price goes up, and the platform takes a percentage cut of wherever it lands. BidDown is a reverse auction: the buyer sets a ceiling and sellers bid the price down, for a flat coin fee. Same collectibles, opposite mechanics. Here's how they actually compare.
BidDown vs. Mercari: Fees, Format, and Which One Fits You
Mercari is a general marketplace: a seller lists at an asking price, buyers can send a single offer below it, and the seller accepts, declines, or counters. BidDown is collectibles-specific and works the other direction — a buyer posts their max price once, and every seller who has the item competes by bidding it down against each other, not just against the buyer. Here's how the two compare.
BidDown vs. TCGplayer: Fees, Format, and Which One Fits You
TCGplayer is a fixed-price marketplace built around card pricing data — sellers list a specific card at a specific price, and buyers buy whichever listing has the best price-plus-shipping combination. BidDown isn't a fixed-price marketplace at all — a buyer posts what they want and their max price, and sellers compete by bidding it down, whether or not anyone currently has it listed. Here's how the two actually compare for trading-card singles.
BidDown vs. Whatnot: Fees and Which One Fits You
Whatnot built its business on live-stream auctions: sellers go live, viewers bid in real time, and the energy of watching a pack get opened or an auction close drives the sale. BidDown works from the opposite direction: buyers post what they want and the most they'll pay, and sellers compete by bidding that price down, no stream required, though BidDown has its own live format too. Here's how the fees, formats, and buyer/seller experience actually compare.
How to Sell Trading Cards Without Paying eBay-Style Fees
Most marketplaces take a cut before you ever see a payout: a final value fee, a payment processing fee, sometimes a listing fee on top. Add them up on a real sale and it's often 10-15% of the price gone before shipping. BidDown works differently: flat coin fees, no percentage cut, no matter what the item sells for. Here's the actual math.
Pricing to Win: A Seller's Guide to the Reverse Auction
Most sellers show up to BidDown thinking like they would on eBay or Whatnot: set a price, wait for a buyer. That's backwards here. On BidDown, the buyer already told you their ceiling before you ever placed a bid. Your job isn't guessing what someone will pay. It's figuring out the lowest price you're actually willing to accept, and bidding it down smart enough to win before someone else does.
Reverse Auctions vs. Traditional Auctions for Collectors
Most auction sites work the same way: something goes up for sale, and buyers compete by offering more money until time runs out. BidDown flips that. Buyers post what they're hunting for and the most they'll pay, and sellers compete by bidding that price down. Same core idea, competitive bidding, just reversed. Here's what that actually changes for how you buy and sell.
Selling Pokémon Cards Without Paying eBay-Style Fees
Pokémon sellers feel marketplace fees more than most collectors: high volume, low-to-mid price points, and a final value fee that eats a bigger share of a $15 card than it does a $1,500 one. BidDown's flat coin fee doesn't scale with price at all. Here's what that actually looks like on a typical Pokémon sale.
Grading & Condition: What Buyers and Sellers Actually Mean
More disputes on collectibles marketplaces come down to a condition misunderstanding than anything else: a buyer expecting "mint" and a seller shipping "near mint by their own judgment" isn't fraud, it's a definitions gap. This guide gets buyers and sellers speaking the same language before a bid ever gets accepted.
Ripper Mode: Turning Live Streams Into Sales
If you're already running live pack-opening streams, Ripper Mode connects that audience directly into BidDown's marketplace: viewers post want listings tagged to your session, and you pick the winner in real time. No separate app, no waiting for viewers to browse the marketplace after the stream ends.
Staying Safe on BidDown: A Buyer & Seller's Guide
Every marketplace attracts a few bad actors, and a reverse auction has its own specific wrinkles buyers and sellers should know about. This guide covers how BidDown protects you by design, what to watch for, and exactly what to do if something feels off.
Writing Want Listings That Get Filled: A Buyer's Guide
Posting a want listing costs a coin, and a listing that never attracts a bid is a coin spent for nothing. The difference between a want listing that fills fast and one that sits ignored usually comes down to a few decisions you make before you hit post, not luck.