Yes last night i wasted a lot of time of these stupid private keys but got nothing so i will suggest you these are just crap so OP is interested to make giveaway than send each person to 1 key than we have chance to get some balance.
Please stop spreading nonsense around here. You clearly do not know what you're doing. What does syncing have to do with this? A synced Bitcoin Core takes a small amount of time to import the private key (dependent on the hardware). It took me around 20 minutes to import the private key with 0.53 BTC on my laptop. However, sweeping the dust is something else entirely.
I was able to asses that a private key was completely working. Someone with a bit more skill should be able to easily sweep the dust and get most of the Bitcoin from the address. Just because you are not doing it right, it does not mean that it can't be done (applies to me as well).