You pays your money, you takes your choice. If the client wants to save £2.50 to go with a broker armed with a mobile phone and calculator with no back up in terms of providing another aircraft should an AOG occur - that is sort of client I'd prefer not to have frankly. If you want a hamburger go to Burger King, if you want fine dining go to a nice restaurant. Honestly speaking, you'll not find me dining at Burger King with clients !!!
At the end of the day, it is easy to broker aircraft with a few airline contacts and a fancy website but it is all about when things go wrong that a good broker comes into their own.
Hurrah for brokers
SB