Is the offer on Ebay trustworthy?

Here:

https://m.ebay.at/itm/324033737272

It has a lot of good reviews and now it is 3 people's turn to bid on the part. The bidding is still running for 21 hours.

Yes, but why is it so affordable?

I would not buy from this seller; see his 2 negative reviews.

What I also don't like: Non-public bidder list; if you have nothing to hide, you show it and he operates in my opinion Shill bidding.

Wait until the offer expires, the price will increase enormously.

You have to increase it, i.e. Offer it, and whoever wants to pay the most will get it.

Only one can buy it.

Since the seller does not offer Paypal, I would be very skeptical about the high price and advise against buying.

The risk of encountering an insecure seller here is very great. If there's still time, I would write to the seller and ask why he does not offer PayPal. I suspect (!) It is a minor who received this Mac as a gift, but now wants to get rid of it.

Even if I had nothing to hide as a seller, I would voluntarily forego PayPal ;-)

My experience shows that in the event of complaints, PayPal is a good reliable helper for the buyer to get the money transferred back.

Right and therefore I would never accept PayPal as a payment method as a seller.

the buyer only has to claim that there was something else in the package and Zack gets the money back. ( probably )