Normally, a company surcharges a part for approximately 20% . these guys got me for $450 on a $100 part.(it's available on amazon!) The annoying middle-aged guy (looked 30 years older from poor life choices, his words not mine) gleefully told me that he looked up my furnace and brought it (the part) with him knowing that he was wrong. I not trying too be trifling and get overly personal, just paiting a picture.
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