At -120 straight bet for staight bet you essentially double the houses advantage of 4.5 to 9 percent. Most times it will not make a difference
and you will lose just as often as not. Worse yet those extra points build confidence where you had none before lulling you into a false sense of security when you when win. This dilutes what haddicapping/guessicapping you do as you always think in terms of that security which is false. This leads to bad habits as you start trying other gimmicks at those bad prices or some facsimle thereof.
Moral of the story. The pros fight like dogs to turn there money over at 5 percent and overcome the houses 4.54 percent edge. They do this knowing the full math of everything they are doing.
You on the other hand want to step up to the counter and bet me straight bet for straight bet - 120 to buy a 1/2 point or point thus doubling my hold over you to 9 percent or 9 dollars per hundred instead of 4.50 per?
ANY TIME, ANY PLACE, ANYWHERE. I WILL FLAT OUT OWN YOU AND YOU WILL GO BROKE TWICE IF NOT THREE TIMES AS FAST IN THE LONG RUN.
NOT A GOOD IDEA.