$8500-9000, if the game is superb.
Collector quality can average up to $10-12K.
HEP will go for more.
Non-dealer prices.
I would not sell one in superb conditions for less than $8K at the current moment based on buyer market insanity.
Garbage player games that are chewed up run up to $6500.

For new collectors.

Start networking, more patience.

Searching for a few months or even a couple years for a common collectible game such as MB is minimal in comparison to searching for rare titles that take a quarter century to obtain.

There are plenty of beat to hell MBs around the world. More than the available NOS or refubished PFs for the time being.

The trick is being able to:

1) Travel to pick it up, it is not coming to you or show up locally
2) Be willing to deal with shipping, including from overseas if necessary
3) Learn how to negotiate and make deals.
4) Have trade options available to you
5) Use the phone, not email

Nearly 90% of all games that end up in collectors hands, stay in collectors hands, they simple rotate to new people.

The rest get sold to dealers and sometimes recycle back into routes.

Best of luck on your searches.