"....I would say the seller’s responsibility ends when after plugging it in/setting it up it works as described. To be generous I would give the buyer 1 day assurance that all is well. It is the buyer’s responsibility to immediately check it out upon arrival..."
+1 ....full stop.
OP fact circumstance as described with an intervening month until Buyer’s sudden wailing started sounds more IMO as either
(a) buyer’s regret, or
(b) buyer f****ed it up after he played with a month.
so ..... sayonara and tuff noogies to Buyer and no further seller responsibility(ies) ....full stop.
+1 ....full stop.
OP fact circumstance as described with an intervening month until Buyer’s sudden wailing started sounds more IMO as either
(a) buyer’s regret, or
(b) buyer f****ed it up after he played with a month.
so ..... sayonara and tuff noogies to Buyer and no further seller responsibility(ies) ....full stop.