[knoxploration]

Thanks for the opinions. I also posted this question on a few other boards and got a number of responses. The majority opinion seems to be that once the buyer receives the item and says, "it works great, I love it" the transaction is over. Most indicated that there is an implied window for any return/refund requests, and 3+ weeks is certainly outside of that period.

I'd definitely agree with that (and I buy a lot more than I sell, tbh). A week after receipt is probably fair, two weeks is definitely stretching it. A month is far too long to be changing one's mind.