What's a fair price for a 2003 Generac Guardian 15kW? Seller asking $600
Edit: thank you everyone! I'm going to pass on this
I'm looking at buying an older Generac Guardian and wanted some opinions on what it's actually worth.
Details:
- Model: Generac Guardian 0043901
- Approximately 2003
- 15kW continuous / 16kW peak
- 992cc GT-990 V-twin engine
- Currently running on natural gas
- Unknown total hours, no hour meter
- Approximately 18–20 days of runtime over the past 10 years, plus weekly exercise cycles
- Uses roughly half a quart of oil every 48 running hours
- Some oil residue in the enclosure, possibly from messy oil changes rather than a leak
- Some rust along the bottom of the enclosure
- Reportedly maintained regularly and runs reliably
The seller is upgrading to a larger unit and will let me see it running before removal.
I'm planning to convert it to propane and install it myself with permits.
Main question: Is $600 a fair price for a 23-year-old standby generator in this condition?
I've seen older Generacs sell for $300–$500, but I'm curious what others have actually paid or sold similar units for.
Would you pay $600, negotiate closer to $400, or pass entirely?
One additional question: Has anyone used one of these older Generacs with an inverter/charger like the EG4 GridBOSS/FlexBOSS? Any issues with THD or voltage/frequency stability?
thank y'all for any help. I'm new to generators and trying to learn