Goodman is a good unit if installed correctly. All HVAC equiptment is good if installed corectly.NOTE of caution. All Goodman and other brands of equiptment sold on Ebay or other sites are not covered under the manufactures warrenty. In order for you to get the warrenty the equiptment has to be installed by a professional in the HVAC trade.
This has been listed by every manufacturer for many years as part of there policy for warrenty part replacement and labor allowance.
In order to install the new equiptment today you have to posess the skill and have the tools. I am retired from the HVAC trade after owning a small 37 man corporation for over 30 years. The testing and start up tools cost at least 1000.00 and you need the to set the CO on a new install on startup among other things.
If you doupt what I have told you call the main factory of Goodman,Carrier,Bryant, or any other manufacturer. If you call the illegal dealer on Ebay he will tell you he can get the warrenty parts for you but you will have to pay for them until he gets credit from the factory. Guess what he never gets credit and you will not get your $$ back
I have given you this message out of good will. I actually do not care where you get your equiptment because I am no longer in the business but I will say that over the years we turned down many service calls because the customer wanted us to warrenty there job and there was no way we could do that since the factory did not sell us the equiptment. All sales use the serial number to log the purchaser. When you go to get parts the computer kicks out the transaction because the equiptment was not sold to a legit dealer but to a home owner.
This note was just mentioning the facts so you make sure your equiptment that comes to you is legit so you have no warrenty problems. Good luck