I got some old BTC, they have been on several addresses but you will get the private keys for all the addresses for the last 9 years. I require BTC that have been at a kraken/bitstamp/other popular exchange wallet just one transaction before sending to me.
Your "ad" is a simple laundry method from the many that we've seen from the moment that BTC gets a new terminology with "old", "new", "clean", "virgin", etc, stupid terms. The only thing that I still wonder is how you expect to get anything. This is an obvious trap, and nobody will fall for this. Except for the same newbies like yourself.
Anybody interested? Make me offers.
Offers for what? You should make offers to us, not us to you!
If you have coins that can be linked to anything that is otherwise considered problematic, then it doesn't really matter whether they are coins that someone has been keeping in their wallet for 6 days or 6 years. For example, if you try to check the AML score of coins you got in a mixer campaign 5 or more years ago, believe me, they didn't clear on their own if you haven't moved them since then.
It's exactly as you said it. The score remains from the moment that the address is tagged as "shady" or "blacklisted". The problem is that you can't get rid of it, no matter what you do. At least as far as I know.