This should be moved to the main forum so it sees some traffic. I'm pretty sure Greg is a member but I don't know his screen name. I would ask the mods to move this for you.
These days you can never be to careful. Video calls showing the cue is a good way to see the seller has the item, but...
I don't see the pin in the pictures. I'm guessing it's in the butt? or you probably would have mentioned it if they were in the shaft. It reminds me of a older Robinson cue from the mid 80's. but I believe his pins were in the shafts not the butt.
First I am not a cuemaker. Here is a picture of an 86ish meucci original with the 5/16-18(top)...A 1989 Sherm(middle)....And a 1988/89 Schon(bottom)...Id say its definitely not an 18 pin. When I compare the Sherm/Schon they are very similar and the Sherm shaft fits the Schon. My Sherm is...