I ended up passing on this BZ.  The condition wasn't what I expected and the seller is inflexible on price.  He wants $325.00... I offered $200 based on the condition... he went to $300 but wouldn't budge.  I'd have done $250 at the most but I saw it was useless trying to barter with him.  He's firm on that price and,  well,  it's not in $300 condition (IMHO).  The monitor has a wave to it,  it's dirty as all hell,  the black light is out,  marquee is out,  monitor only has a green overlay (no red/orange)...
I ended up picking up this instead:

Which,  evidently, is also part pinball:

Monitor needs to be rebuilt:

But the guns work good...
I've already pulled the chassis and will be rebuilding it tonight or tomorrow night.