So after some thorough research I found out that Aero Marketplace is using a lot of the same elements as Nucleus Marketplace did. Now, Nucleus Marketplace was believed to been seized as money didn't move from their wallet. But upon checking that same wallet again, you can see that there has been activity and this is recently too.
The entire webpage of Aero looks like Nucleus did, but with some slight changes to the design. They use the same features that Nucleus had upon launch. Aero is believed to be German operated and Nucleus was too. Comparing how Aero administration communicates it is too very similar to how Nucleus administration did. Their forum is too a nearly exact replica with same categories and similar descriptions. Nucleus too boasted to have had a 'large development team'. Their maintenance, reasons and issues is a near replica of what Nucleus had.
I liked Nucleus