did you ever restore a backup of your wallet? Did you ever do anything with your wallet.dat file?
I did not yet try to restore backup of wallet.dat. its in my home pc.
I dumped privkey and imported it here, then I also imported privkeys of the purchased syscoins. nothing appears.
How many times did you import the privkeys from the purchased sys? I would definitely recommend using that wallet backup. When you imported the first privkey and saw nothing why did you continue? Were you fully synced when importing these keys into the new wallet? Thanks