POS ROI:
Blocks 2500 – 10000: 2500%
10000 – 25000: 5000%
25000 – 80000: 750%
80000 – 130000: 1000%
130000 – 170000: 2000%
170000 – 190000: 3600%
190000 – 200000: 7200%
200000 - END: 1000%

Not sure where you will find out what block they are on except if you download the wallet and look at the sync numbers.

I wonder how many of these coins you need for it to start to give staking rewards.