The user @Zbigniew doesn't answer my messages after I paid (for the Triple Steeple module).
Of course, unforeseen things can happen. Against my habit, I used a bank transfer because the seller had a lot of good feedback. Based on that I convinced myself I could make an exception not to pay with PP covered by buyer protection (Yup, wondering why after all those years ;-) ).
I still hope to close this deal properly, but if you consider buying from @Zbigniew and your messages get answered then be warned.
PS. If I get an update from the seller, I will update this thread accordingly.
I just got an update from @Zbigniew with his apologies and an explanation for his unresponsiveness. I can understand his situation and the reason for the delay. He also promised the module to me this week.
Closing update: I got the module and it's in mint condition. So besides the delay and the lack of response at some point, in the end this was a successful transaction.