Everyone will have different prices points as some people view certain items as a necessity while some do not.
A pair of surplused BDUs $60
A pair of surplused boots $30
A JT spectra paintball mask $45
An entry level AEG $350-450
A bag of BBs $15
Do not forget the factor in the costs of shipping, the requirement for additional batteries and a quality charger to charge those batteries. As well as the need for additional magazines, a rig to carry said magazines and other possible equipment that you may require...such as the need for water. As it stands by the time a person acquires everything they need its very possible that what started off as a triple digit may easily end up as a four digit number.
"Its only a little bit on fire"