I paid $100 but didn't get them Amazon because they charge sales tax here in WA.
They are too good to be garage speakers or beaters. They don't deserve to get dusty and dirty
And yes, you can plug them into your phone no problem. Mackie even supplies the 3.5mm to RCA stereo cable.
Just remember that one of the speakers is powered and need to be plugged into an outlet.
Highly recommended as desktop speakers.