http://www.mercuryleads.com/telemarketing-script-development-lead-generation.asp - If you use someone internal to do telemarketing, you will need to recruit the right sort of staff, train them on the sales process, incentivise them and keep them. This can be an expensive process as good staff are hard to find (as any business owner will understand). In outsourcing telemarketing all the costs related to training and recruitment are covered. All incentives and bonuses are covered to ensure that staff are keen to achieve result.