I work in the industry and can tell you that first off, Sportsbook.com is a chop-shop with no respect amongst real bettors. It is what we call "deposit only" meaning you deposit, and never get paid. If you are looking for places you can trust with high limits: Greek, CRIS/Bookmaker, 5Dimes, Pinnacle (US players need to be vouched for or have a betting agent to get a credit line ), Bet Jamaica. Jazz and Sportbet are good for smaller players. And if you are halfway sharp, BoDog shades their lines heavy on favorites so you can always grab a point or two on underdogs -- though they'll put you on the "sharp" package if you start to win.
Second, prop bets always have low limits, plus if you are a recreational bettor, tying up your funds on a play you can't hedge off is not smart.
As for the actual prop, as I and the gentleman before mentioned, the limits are low and it doesn't take but a max bet to move a line. You in a posting forum asking if you should bet a play it means this prop has been available for a decent amount of time. It also means bettors who are sharper than you already pounded it out and got a much better number say -150. I don't know the opener, I just know how those places work. For example, one place I bet at had a $250 limit bet on will Haile win the NY marathon? The price was crazy, like even money. I'd bet my house against any marathoner NOT to win at even money. Needless to say, I was doing some other work, went back to check later in the day, and the price was -200 on "No". I missed the boat and wasn't about to lay that type of price regardless of the situation.
Hope this helps...