I still maintain protections are available to purchasers under implied warranty provisions in State laws and the Uniform Commercial code.
From the NH Dept of Justice:
But what happens when a buyer "accepts" the merchandise and later discovers that it fails to meet the sales contract and warranty requirements? The buyer may be able to revoke acceptance of the merchandise, and, in effect, secure a "refund." Under the UCC, a buyer may revoke acceptance of merchandise that fails to satisfy sales contract requirements if:
The buyer accepted the merchandise before discovering the defect, and the defect was not readily apparent or easily discovered, or the seller assured the buyer that there was no defect
The buyer accepted the merchandise knowing it had a defect and reasonably assumed that the defect would be cured, yet the defect has not been cured
In either case, the consumer's revocation of acceptance must satisfy at least these preconditions:
The nonconformity of the good "substantially impairs" its value
The buyer notifies the seller within a reasonable time, before the good deteriorates substantially" due to causes unrelated to the defect related to the revocation
The buyer exercises the proper degree of care to protect the seller's interest in the good