How to Build a Buy Box: Know What You're Looking For Before You Search
It's tempting to open a marketplace, start scrolling listings, and let interesting deals shape your search. That approach burns months. You'll message brokers about businesses you were never going to buy, lose track of what you've already ruled out, and end up comparing a $40,000 content site to a $600,000 SaaS product as if they were the same decision. A written set of criteria, sometimes called a buy box, turns searching from browsing into filtering. Here's what to define before you start.
Business model and monetization
Every online business monetizes one of a handful of ways: advertising and affiliate commissions, direct product sales, subscription software, transaction fees on a marketplace, or audience monetization through a newsletter or community. Each of these is a genuinely different job to show up and do every day, not just a different line on a spreadsheet.
Decide which models you're actually suited for and interested in running before you look at a single listing. If you have no interest in managing inventory and customer service tickets, ruling out e-commerce upfront saves you from wasting time on businesses you'd resent owning within a year, no matter how good the multiple looks. Online Business Models Explained walks through what day-to-day ownership actually looks like in each model, and the Business Model Deep Dives use real public company filings to show what the underlying unit economics (take rate, gross margin, repeat-purchase rate) look like in each one, so you know what to check once you're evaluating a specific listing.
Price range: what you can actually deploy
Your price range isn't just "what I can afford." It's a function of how much cash you have for a down payment, how much SBA or seller financing you can realistically qualify for, and how much operating buffer you want left over after closing. Write down a hard ceiling and a realistic target, not just a ceiling. Searchers who only set a maximum tend to drift toward it on every deal, because every seller's pitch makes their business sound like the exception worth stretching for.
Multiple range: what you're willing to pay for a dollar of profit
The multiple (typically expressed as a multiple of SDE or EBITDA) is where price and profit meet. Multiples vary enormously by business model and size: a small content site might trade at 2-3x annual profit, while an established SaaS product with strong retention can command 4-6x or more at the same profit level. EBITDA Multiples by Deal Size breaks down realistic ranges. Decide upfront what multiple range you're willing to pay for the models you're targeting, so you can immediately tell whether a listing is priced in your range or a broker is testing what the market will bear.
Profit, revenue, and margins
Set a minimum profit (SDE, seller's discretionary earnings, or EBITDA depending on deal size) you need the business to clear, based on what income you actually need it to replace or supplement. Separately, look at the revenue behind that profit and the margin it implies. Two businesses can show the same $150,000 in annual profit with completely different risk profiles: one on $300,000 of revenue at a 50% margin, the other on $1.2 million of revenue at a 12.5% margin. The second is far more exposed to a small revenue dip wiping out most of the profit. Decide what margin floor you're comfortable with before a broker's pitch deck talks you out of caring about it.
Time available
Be honest about how many hours a week you actually have, and whether you're searching toward replacing a full-time income or supplementing one. A content site that needs five hours a week of upkeep and a SaaS product that needs forty are not comparable purchases just because they show the same profit. If you're searching part-time while employed, ruling out operationally demanding models (e-commerce with daily fulfillment and support, for instance) upfront will save you from finding out the hard way after closing.
Write it down as a one-page buy box
Put all five of these on one page: business model(s), price range, multiple range, minimum profit and margin floor, and weekly time commitment. Use it to filter every listing you look at before you spend time on financials or a call with a broker. It won't stay static (you'll refine it as you see real deals), but starting your search without it is how searchers spend a year "looking" without ever making an offer.
Next: once you know what you're looking for, the next question is where these businesses actually get listed and how the popular marketplaces and brokers compare.