They're not listed on DB's public resale sites, but then any such purchase would probably be a multi-million pound negotiated deal and not something a regular company or association would be browsing.
I suspect in reality, like the MET, the offer to sell was symbolic and just to avoid accusations of trying to sabotage competition. I'd be astounded if anyone actually bought them. Who on earth could conceivably want and use them? They're way out of the league of any European Sleeper/Flix style operation and no major high speed operator would want tired trains built to someone else's spec.
You can't park a train like this in a siding and send a bloke with a box of spanners to fix it. It requires vast specialized maintenance facilities and expert technicians, which, in Germany, only Deutsche Bahn has. They will do maintenance under contract, but probably not in this case since the maintenance was so problematic in the first place.
The only thing I can think of that might make some sense would be RENFE, since they already operate a similar type and are already equipped with 25kV, LZB and ETCS as used on Spanish AVE lines. But I doubt they've any actual need for extra non-gauge changing trains that are older than their own Velaros.