if they are not prepared to pay a very reasonable price to help them realise their 'dream' of being a smaller size or whatever then forget them.
They are not going to buy your backend products for higher amounts of money ( I presume there are some) so you will be wasting your time on them if they stall over $5 odd. Instead concentrate on your existing customers, ask them what morre they want from you and offer it to them with as many added benefits as possible ie give them more than they asked for or expected.
Let the ones who wont pay stay fat and probably unhappy that their dream havnt been and never will be realised until they are prepared to make the effort.
Obviously dont be rude to them but have an autoresponse set up reaffirming the guarantee, the benefits, that the dream can be realised, but that if they do not feel their happiness is worth $5.95 then you are unable to help them

mike (I dream of a six pack) bailey