I realize it is graded vga so I would assume it is authentic but I am always cautious just want to know your thoughts on both the authenticity and value.

No questions asked it's authentic. I have a 95 vga and it's not common that they screw up on authenticity with oem Nintendo carts.

Great to know it is authentic! Any idea of the value? I saw some complete copies sell on eBay for around $700-800 but not sure what value would be considering it is sealed and graded. 

 

Are you interested in selling it?

It's not sealed, though, it's only verified as "unused" (Qualified).  So, very rare game, kind of low grade, Qualified not Sealed; Kind of up to you what what you'd want to offer here.  If complete ones are going for $800 now, maybe something like 1000-1500?  I honestly don't care for Qualified stuff myself and wouldn't be looking to pay much more than a regular CIB copy.

I am actually talking with the seller now to buy this, but wasn’t sure what to offer/value. 

Oh I was under the impression that in order for the game to be graded it needs to be factory sealed. The seller stated it is brand new/factory sealed.
 

I wouldn't deal with a seller who told you that.  They are either outright lying to screw you or ignorant and don't know what they have.  Option 2 is highly unlikely but possible if they did acquire it second hand by buying out an entire collection or something.

75 is not that good of a grade on CIB and I would value it no more than a normal complete copy.  It is not sealed, it is complete and "new", meaning good insides and unplayed.  But most of the VB games are unplayed anyway so that's not much of a premium on something like this.