This is the bass discussed here  
If it's an Alembic I might give the seller a second chance offer
The serial number's MG doesn't make sense to me, but it's what the seller gave me...

I do not have a file with that serial number code, nor is it one that we use here. This is definitely a personal project of a former employee.  
 
The number 12451 was issued to an standard Excel 5-string bass sent to a dealer in VA.
 
So, I think the bass was probably made on shop night, but it isn't an Alembic brand, despite the logo on the peghead. Some people find the shop night instruments to be collectable.  
 
From looking at the pictures, it's got a Flame Maple top, Mahogany body, Mahogany neck with a Maple veneer running down the center.
 
We consider shop night instruments to be just that - personal projects. We don't consider them Alembics, because they are not communal projects that are subject to the scrutiny of our normal standards. That being said, I've seen some very nice shop nice instruments!

Thanks for the info, I'll see what I do. I think it's an interesting instrument, but there are some nice Alembics for sale on this side of the huge swimming pool.  
Thanx!
Flip