Pull up the same player prop at four different sportsbooks and you'll often see four different offers. One book has a receiver at 58.5 receiving yards at -110. Another has him at 56.5 at -115. A third has 58.5 but at -120, and a DFS pick'em app has him at 57.5 with no price at all, just a fixed payout.
They all look like the same bet. They aren't. Over a season, the difference between taking the first number you see and taking the best one available can be the whole difference between winning and losing.
That's what line shopping is: checking every place you can legally bet a prop and taking the best version of it. It's the most boring edge in sports betting, and the most reliable one.
Why books disagree in the first place
Sportsbooks don't all price props from the same model. Some build their own numbers, some license odds from a data provider, and some move their lines mostly by watching what sharper books do. Player props are also lower-limit, lower-attention markets than spreads and totals, so a book can sit on a stale number for a while before anyone forces it to move.
The result is that props disagree more often, and by more, than main markets do. That's bad news if you only have one app on your phone. It's good news if you have several.
Two ways a prop can be better
A prop can beat another book's version of it in two ways, and they're worth thinking about separately.
Better price, same line. Two books both have a player at 24.5 points. One is -110 on the over, the other is -120. Same bet, but one pays more when you win.
Better line, similar price. One book has him at 24.5, another at 23.5, both around -110. On the over, 23.5 is strictly better: every outcome that wins at 24.5 also wins at 23.5, plus the games where he scores exactly 24.
Sometimes you'll face a trade-off between the two, like 23.5 at -125 versus 24.5 at -105. Which one is better depends on how often the player lands on that exact number, which varies a lot by stat. A half-point around a common result (a quarterback's completions, a pitcher's strikeouts) is worth more than a half-point in a stat where exact landings are rare.
What price actually costs you
American odds hide how much a small price difference matters. It gets clearer when you convert odds to the win rate you need just to break even.
| Odds | Payout on a $100 bet | Break-even win rate |
|---|---|---|
| +100 | $100 | 50.0% |
| -105 | $95.24 | 51.2% |
| -110 | $90.91 | 52.4% |
| -115 | $86.96 | 53.5% |
| -120 | $83.33 | 54.5% |
Every step from -105 to -120 raises the bar you need to clear by about a point. That doesn't sound like much until you look at it over a lot of bets.
Say you're a genuinely good prop bettor who wins 53% of your bets. Here's your expected return per dollar wagered depending on the price you usually get:
| Typical price | Expected return | Over 500 bets of $50 |
|---|---|---|
| +100 | +6.0% | +$1,500 |
| -105 | +3.5% | +$869 |
| -110 | +1.2% | +$295 |
| -120 | -2.8% | -$708 |
Same picks. Same 53% hit rate. The only thing that changed is where you placed the bets, and it swings the result from a $1,500 profit to a $708 loss.
That's the core point of line shopping: your handicapping sets how often you win, but your price decides whether winning that often actually makes money.
DFS pick'em apps change the math
Pick'em apps like PrizePicks, Underdog and DraftKings Pick6 don't price each prop. They post a line and pay a fixed multiplier for getting a set number of picks right. That makes them easy to compare on the line and hard to compare on price.
The way to put them on the same footing is the break-even rate per pick. A two-pick entry that pays 3x needs each pick to hit about 57.7% of the time to break even, assuming the picks are independent. That's a much higher bar than a -110 single at a sportsbook.
So a pick'em line needs to be meaningfully better than the sportsbook line to be worth playing. Where they earn their place is when the app's line is off from the market: if the sportsbooks all have a player at 6.5 strikeouts and a pick'em app has him at 5.5, that half-point can be worth more than the payout structure costs you. Payout tables differ by app and change over time, so check the current one before you build an entry.
How to actually shop lines
Have more than one account. This is the whole game. Every legal book available in your state is another shot at the best number. Two books is much better than one; four or five is better still.
Compare before you bet, not after. Decide what you want to bet, then check every book for that prop. It's easy to see a number you like and fire before looking elsewhere.
Look at the line and the price together. Don't treat -110 as the default. Some books routinely hang props at -115 or worse on both sides. Over time, that tax adds up.
Watch for the book that's out of step. When four books agree and one is a full point off, that outlier is either stale or knows something. Either way, it's the one to look at closely.
Move fast when you find a gap. Soft prop lines tend to get corrected once money hits them, so the best number usually doesn't last.
Track where you placed each bet. If you log the book and price alongside the result, you'll see how much line shopping is actually adding to your bottom line, and which books keep giving you the best numbers.
Doing it without ten tabs open
The honest downside of line shopping is that it's tedious. Checking one prop across five apps takes a few minutes. Checking a full slate takes most of an evening.
That's the problem Betravon was built to solve. It pulls player props from sportsbooks, DFS pick'em apps and prediction-market exchanges into one board, lines them up by player and stat, and shows you which book has the best line and price for each side. You still make the call on which props to bet. You just don't have to hunt for the number.
However you do it, the principle is the same: the pick is only half the bet. The other half is where you place it.