Standard full day kollel stipends are: In Israel center (Yerushalayim – bnei brak ect) 1300 nis to 2200 nis per month. (That is around $400 – $600) But they do not always pay in a timely manner. This includes the goverment stipend. However – if you have 3 children and little other incone than you can get an additional 1100 nis per month from the goverment.
Outskirts of israel – the pay range is huge! From 1300 to as much as 3500 nis. Some very high paying kollels are Meiron – The halacha kollel in haifa – and other specialty kollels.
The typical avreich here barely squeeks by – this even with the wife working and that most avreichim got a free or heavily subsidized apartment from their parents n law. Most avreichim also learn either un a night or pre shacharis kollel – and many also lean in friday kollels.