I have one that is seen virtually no usage. Less than 10 hrs. Has a 7 HP Briggs engine that runs perfectly. Just used it during Ne powerfailure on Aug. 14. Output is 2500 watts I believe. Bought new somewhere around 1970 during Connecticut ice storm. Two 15 outlets and two 15A 230 outlets. I find the output is a little low to meet my house requirements. Make an offer.