there are alot of tzedaka organizations that say if you donate a certain amount of money then someone will daven for you..it doesnt sound right to me. everyone gives what they could and should all be able to be davened for no matter how much they give!how could they say only if you donate a certain amount..anyone else agree?
Teshuva, Tefilla, Tzedaka Mavirin es roah hagizera.
You do teshuva yourself, you dont pay anyone to do it for you (nor can you), so, daven yourself and give whatever amount of tzedaka you can, to any worthy cause.
Chazal never stipulated that only tefilla by specific tzadikim, or specific amounts of money will be mavir es hagizerah.
The question is not, does it help to have a tzadik speak to hashem on your behalf, but, how much is it worth for you to have the tzadik speak to hashem on your behalf. If $36, pledge.