Sun Tach Transmitter and tach price

Hey,
I'm selling these for a late friends widow and looking for a ballpark price to put on them, two transmitters and a tachometer. Condition is unknown to me. Thanks for any and all help, much appreciated.

 

I've seen the early Sun tachometers sell for 100. to 300. dollars. The Transmitter boxes are usually the week link if they have corroded battery compartments. If the battery corrosion has gotten into the switching coil and contact they aren't worth anything. If you advertise the transmitters remove the covers so potential buyers know the condition. I have Sun Tachs in my three Hot Rods and with modified transmitter boxes that eliminate the batteries. That is a logical modification for the boxes.

 

Thanks, I will pull them apart and see how they are. Know nothing about them.

 

Both are opened up and a quick clean up. Batteries weren't all that bad nor the contacts. Then again others know way more about these than me. I did discover (1) is 8 cylinder. and the other is 6 cylinder.