@cundare2
I have purchased several products from The Music Room and they are excellent. Their web site says “New product lines for which TMR is an authorized dealer carry a 60-day satisfaction-guaranteed return policy. Return shipping costs are at the expense of the customer unless the product is defective. Full manufacturer warranties are in effect for these products”. I suggest you ask them for an integrated amp under 40 pounds.
please see their preowned list of integrated amps.