When purchasing online you, as the buyer, make certain logical assumptions in regards to your purchase. You assume that the seller is going to ship you your item even barring a specific notice from the seller saying "yes, I will ship the item to you". You assume that what you're going to receive is what you purchased even though the seller doesn't have a huge banner saying "you will receive the item you purchased". You do not expect a seller to have a 30-day money back period unless it's explicitly written out that they do.
Can you honestly tell me that if you don't see a specific returns policy on a website you automatically assume the seller will take the item back, no questions asked, 5 years from now when you finally get around to opening the box?
No, what you assume is that a) the seller doesn't accept returns or b) you should investigate further to see what the seller's return policy is before buying anything. You, as the buyer, take responsibility for your purchase which is the crux of the point that I'm trying to make.
If I see a sales thread from a brand-new seller with postage-sized, blurred photos of books, no references and no mention of a return policy, that is a huge warning sign to me. If I'm absolutely dying to buy from this seller, it's in my own best interest to investigate further before committing to a purchase. If I can't be bothered to do so, well, that's kinda my own fault.
I don't see anything inherently shady in having a "no returns policy" - there are plenty of sellers here who explicitly state they won't take returns on CGC'ed books, for instance. It's just another piece of information that allows me to decide whether to purchase from a specific seller.
I'm pretty sure Rupp didn't buy any pointed cruxes. I believe it was a comic book.