Q: Im trying to sell my macbookPro but his asking for MODEL

Right click on Apple logo and select About My Mac.

The only information you do not want to share is your Serial Number.

He will probably also want to know how much hard drive space you have and also whether or not you have an SSD.

Kim

They cannot do anything with the number except for look it up and see the specs of the computer.

And in addition read this: What to do before selling or giving away your Mac - Apple Support

Dman1012 wrote:

They cannot do anything with the number except for look it up and see the specs of the computer.

There must be something more there because if you post a serial number in these forums, the Hosts will quickly excise it. Note this excerpt from Apple's Forum article callled, "How to Write  Good Question":

Include your product name and specs such as processor speed, memory, and storage capacity. Please do not include your Serial Number, IMEI, MEID, or other personal information.

(my emphasis)

Yes model number is fine, everything except the Serial Number which is also on the box.

Kim

You can also examine the small letters on the bottom cover of the Mac.