Same address and buyer as gre652fs-77 and mfjh34. Bought one item then cancelled and then bought the same with a new pseudo. Probably scammer.

Just got someone that bought from me same address and name QZHT AADRC

I had a bad feeling about him, good thing I checked here. Gonna cancel his transaction

Asking for order cancellation is an evil buyer?

Annoying for sure but I don't see how this makes someone a bad buyer. That's just a freight forwarding service, and your customer was in China most likely. The "cryptic" billing name is most likely related to the way the freight forwarder identifies who the package needs to go to - I see it all the time at my job. Unfortunately scammers do often use Freight Forwarders but it doesn't automatically equal a scam. They're legitimate businesses used by legitimate people.

Yep same address just did 3 orders at the same time. all Fraud.

We detected the same buyer on https://www.GoVets.com - Detected by our Payment Processor as a High Risk Buyer.

Had the some buyer (other name but nearly same address) for an ebay item I sold to him.

It seems to be a shipping forwarder which is used by many buyers from different countries to get their items forwarded to them.
The silly thing is: I offer worldwide shipping along with advance customs clearance at no additional cost for the buyer and write that in the long and short text of the items I sell on ebay.

There is basically no scenario I can think of in which it would make sense to buy an item from Germany (where I live), have it sent to the US address

707 Carson Dr
Bear, DE 19701-1454
United States

and then have it forwarded to whatever country the buyer lives in. Especially my buyer name is Bulgarian/Slovakian origin, which even makes less sense since both countries are in the EU just like Germany.

DHL informed me that signature confirmation is NOT possible for this address.

Here is another address another buyer just used, which is nearly identical:

Veniamin I. (buyer last name removed for privacy reasons)
705 Carson Dr
Bear, DE 19701-1454
United States

To add insult to injury ebay holds the funds for this transaction for 30 days "until the buyer is happy and has confirmed having received the item"

No thank you. Not in the mood of loosing the item and money to this, what most likely is a scam to abuse ebays buyer protection by claiming someone else signed for it (the shipping forwarder) and getting the money back.

My personal suggestion: Never sent to shipping forwarders unless you know the buyer and there are good reasons to use a forwarder, like to combine many small orders in one larger parcel at the forwarder.

This is especially true for buyers which buy from you and give the shipping forwarder address while you offer worldwide shipping in the first place.