If they came here it would be for resources. Water, O2, minerals, the iron core of the planet, etc.
The indigenous population of the planet would just be consumes with everything else.
Isnt that how it works with every first contact not on TV.
I'm thinking more along the line of antiques such as rotary telephones, transistor radios and old coke bottles....
Doubtful. Anyone smart enough to get this far and defy known laws of physics, is smart enough to manufacture resources.
They're just Looky Loos.
"I have other sheep that are not of this fold." John 10:16