Mirage Speakers?


Craigslist find here...not much out there on these.

2 Mirage 460 speakers
1 Mirage MC-4 center channel speaker
2 Boston Acoustics CRX dipole rear surrounds
Marantz SR-73 receiver

$350

What do I make of this system?

From what I can gather the Mirage 460 are 2-way speakers but not much info. Not much info on the MC-4 and virtually none on the Boston Acoustics?

And the Marantz receiver?
remark900
Sorry csmgolf i must correct my self M7si 84dB /W/m anechoic  which i don't listen to them in and 88dB in-room which i did, But anyway you look at it the sensitivity of this speaker SUCKS.that is why i sold them and stayed with my KHORNS.and the sad thing about them was i tried four different amps!! 
Any possible value of this offering would be in the speakers. The receiver is worth very little, a very inexpensive garage sale item. 
$350 can buy a quality pair of speakers these days.