When does seller's responsibility end?


I'm sure this has been discussed before, but a search could not find it.
I sold a Naim DAC (mentioning this because Naim is notoriously reliable) to someone on November 26, shipped on November 27, 2012.
Did not hear anything one way or another until December 19, when seller emailed to say one USB input would not work with his ipod. Well the input worked for me when I had it. I asked him to be sure he was doing everything correctly, including checking for bad cable. I am not sure the input really does not work.
No word again until December 25, when he asked if I would pay for repair. I answered no, because I felt the time period had been too long and my responsibility was over.
Now he has initiated a dispute/claim against me on Paypal. They have put my account in the negative for the amount of DAC until they resolve it.
Sorry for the long post, I just wonder if there is a consensus on how long a seller should be responsible for "sold" gear. I say a week, maximum.
What say ye?
Ag insider logo xs@2xmuzikat
The moment it ships, fully insured, packed and boxed with the original materials. Avoid paypal in future transactions, not only are their fees outrageous but they offer not protection for the seller from a dishonest buyer. Seller beware.
A few years ago I sold a Phono Cartridge here on Audiogon . The Buyer took 2 weeks after receiving it to mount and use the Cartridge . He reported that one of the mounting holes was damaged and filed a report with Audiogon . Audiogon took my side and thought the Buyer took to long to test it . I had paid with a Postal MO .

That said , Paypal is a different matter . They always side with the Buyer .

Good luck !!
I shipped a Ref 5 to a buyer here on Audiogon. A few months later as we were emailing about our respective systems, he mentioned for the first time that, when he unpacked the unit, he noticed that the perspex top plate had cracked around the screw that holds it in place and asked if I would consider replacing it --about $125 from ARC. I had a good feeling about the buyer based upon our discussions. Too late to make claim with fedex. I replaced it anyway. I believe that we should all operate with an assumption of trust about a buyer unless his rating says otherwise. I think the buyer should be made happy unless he is a jerk, a thief or his claim seems fishy based on the seller's state of knowledge. That being said, under the same circumstance, if the defect was obvious as this one was and the cost of the request was disproportionately high relative to the price at which the item was sold, then that might have caused me to suspect that the buyer broke it and I might have responded differently. In other words---fishy.
Never buy anything without a CC or some type of recource. If the seller won't budge, leave them stuck with the item. There will always be another you can buy.