bought our Jayco 2007 used about a year ago. only problems we have had so far are:
Outside shower unit leaked (probably frost damage, fixed with a new brass unit for $28, took 10 minutes to install)
12v Power converter quit working, If I had taken it in may have cost $150 to diagnose and retighten the screw. Found the issue and tghtend the screw. Free.
$1000.00 would have been a waste. the frost damage would not have been covered anyhow.
most companies make LOTS of money on those policys. both the insurance company, and the seller that guts a HUGE commission.
as stated even a new refer would be well less than a thousand, AND most issues would surface durring the first 3-6 months anyhow