Service contracts are just another money changing scheme designed to separate you from your money. Their purpose is to be a "profit center" not a "cost center."Thought the extended service contract/extended warranties had to be purchased either AT the time of sale or within 30 days.
And, yes they are typically sold at point of sale.
That is so the (high) cost can be folded into the purchase price and financed.
There's a reason they don't offer monthly payments on the service contract policy...
Service contracts are typically provided by a 3rd party. Not the manufacturer of the product; some of the larger dealer groups had their own contracts. Don't know if that's still true.
Service contracts are always negotiable; be it for parts covered, time or mileage covered and of course price.
Service contracts are like any other insurance policies they can be obtained almost anytime, cost and coverage considered.