[Kikibosum]

But at 8 days interval, I doubt that this method is effective. Let's say I buy this pair now, how come it ends up at my house instead of a pair ordered two weeks ago...?

I've simply elaborated on your comment below.

PayPal claim is an option for me

With this:

The only thing that you can use via PayPal Is SNAD (Significantly Not As Described), which Is the equivalent of the wrong Item received method.

It's up to you to evaluate your SE to establish If the time frame Is suitable. I'm not sifting through every post.

As for the dry ice method, can I use it in my case? Can I use the boxing method without dry ice?

Haven't we already discussed this?

The boxing method without the dry ice doesn't work?

It's too heavy to box without substituting the weight.

yes we did discuss this, but I don't want to send back an empty box. I want to apply your method described in your blog, which involves substituting the weight with items such as rolls of tape etc... (I read your blog, it says this: "Let's start by assuming that you are going to do social engineering with a pair of Nike Air Max Tailwind sneakers weighing 550 grams, which is too heavy to send the box by itself. Obviously, you'll need to replace the weight with merchandise equal to (or very close to) that of the sneakers, and instead of dry ice, "you'll pack merchandise that matches what the collection points and carriers have on hand," such as a few rolls of packing tape. If you've ever worked in a warehouse, you know exactly what I'm referring to - whether it's clear or brown tape, it doesn't matter. Both serve the same purpose."
Doesn't this method with tape work? In your blog, it clearly states that it can work unless the object weighs 50kg or is a house.