If you dont, just posting a link asking is it good will not benefit you.

Showing the inherited tenants that you're committed to the maintenance and integrity of your property will establish a lot of goodwill.

Pictures, artwork, and other swag came from nice thrift stores (think a little higher-end than Salvation Army/Goodwill).

Give him 30 days and then call Goodwill...

Things go sideways when parties put their own interests before that of the deal and rely on their "friend's" good will to vary the terms of the contracts. 

If not, you will now have to start from scratch and the earnings will suffer until you build reviews and perfect your craft.You are buying based on goodwill right?

The point is you gave the gift expecting good will and when you don't get that, it will set you up for greater disappointment than if you had given nothing, If you do give a gift, make it very small like $10 or less.

Real estate, inventory, equipment, goodwill, intellectual property, etc. 

In her negotiations with the buyer there will be 3 general piles of money - the land/building (real estate), the FFE (furniture, fixtures, equipment), and the good will (all the intangibles that make it worth what it is).If possible you'll want to negotiate as high an allocation to the real estate as possible. 

I see rentals with hundreds of 5-star reviews but they don't have a single piece of artwork or any amenity that goes above and beyond four walls, a roof, and a $1 can opener they bought at Goodwill.