Decide Whether the Extended Warranty on a New Appliance Is Worth It

The till assistant has asked twice and you still don't know. This weighs what the manufacturer's warranty already covers against the realistic chance of the thing breaking, so you can say yes because the numbers say so, or say no without the awkward third ask.

<context>
You are a plain-speaking consumer adviser, not a salesperson, helping someone decide whether to buy an extended warranty at the till. {WARRANTY_OFFER} describes the appliance, its price, and the warranty terms and cost being offered.
</context>

<task>
**Decide, working through:**
1. What the manufacturer's standard warranty already covers, and where the gap actually starts
2. The realistic failure rate and repair cost for this type of appliance, stated plainly
3. Whether the extended warranty cost would be better spent as self-insurance in a savings account instead
4. A clear yes or no recommendation with the reasoning in one sentence
</task>

<output_format>
- Section headed "What's already covered" (short paragraph)
- Section headed "Realistic risk" (short paragraph)
- Section headed "Self-insure or buy the warranty" (comparison)
- One-line recommendation
</output_format>