I'm new to this forums and my native language isn't english so excuse my bad grammer please

I've recently got my hands on a Bolex H16 Reflex RX-5 camera, it was my grandpa's, he passed away last week.
Its a nice looking machine but i got no clue on the worth or how to use it. A buddy of mine searched ebay and found out that they were listed between 400-1200 dollars... 8O
I've got a lot to remember my grandfather by, and could use the money since i got a baby on the way with my girlfriend.
Could you guys inform me a little bit on the general worth of the machine? I've uploaded 2 pictures. It had 3 lenses attached to the machine, brand xenon, 1:20/50 & 1:1.8/10. a separate zoomlens 1:1.8/12.5-75. It had all the manuals still in the original box.
What do the numbers on the lenses mean? Any information would be appreciated a lot!
Thanks in advance guys.
Regards,
Wouter