SUGGESTION FOR NEWBIE:
DO NOT GAMBLE unless you have at least enough funds (say around 600$) so that you can send at least 200$ to at least 3 Bookies.
If you are gonna play this game you need to start out by playing it right, having only 1 OUT, regarless of the suggestions above... you will have MINIMAL chance of getting the Best available Line.
Your best chances to make money are to distribute your funds among 3 Books.... for a Newbie I would suggest.
1) use NETELLER to send funds back & forth.
ACCOUNTS:
1) sportsinteraction or bodog (best lines for Underdogs on the Net)
2) skybook (free 1/2 point)
3) pinnacle (often best line on the favorite, cheap vig)
***If you were buying a walkman for 50$ or so you would check it out, call a couple of places & make sure you are getting the best price (heck I dont even buy toilet paper, unless its on sale), same should apply if you are making a 50$ bet, dont blindly bet into ONE number***
Hope this helps.