Looking for an oscilloscope

Hey all,

So I posted this as I wouldn't know where to even begin googling....... I'm looking for a place to take a power inverter I bought on Amazon that's claiming its Pure Sine to confirm that it actually is.

From what I've found online while there's ways to "kinda" test it the best way to be sure is to use an oscilloscope to test the wave form output.

Any ideas for businesses that would do this for me or anyone that has one that would be willing to test it for me?

Thanks