Most big time gamblers don't post up..so there is no reason to be posted up in tons of different books. I'm talking about real wise guys though, not those who solely bet online and try to find the best price, etc. Of course finding the best price is important, but so is being able to get down a significant amount. Most books with the best lines don't want professional action. And yes, I can hear you asking .. what about Matchbook, don't wise guys post up there? The answer is no (in most cases), as there is credit available there.
Even if you have posted up at a few of the good books, say CRIS, Diamond, Greek, Matchbook, Pinny (hopefully with credit)..you could easily get down 50k on a side and maybe 30k on a total with little to no effort. Add in a few credit shops and beards at the good books listed above and 100k is easy. So, it isn't really ever a problem for big timers to get down a significant amount of money..and trust me all of those books can and do payout into the 7 figures so there is no possibility that your bet is "too much for them to handle". In fact, even if you are sharp and betting them for insane money, all of those books will simply be pleased to have your action .. the more action the better!