AITA for keeping the yard-sale money from things my relatives left in my garage?

When my grandmother moved into a smaller apartment, my aunt, uncle and two cousins used my garage as a sorting space. Everyone took the furniture and keepsakes they wanted. The remaining boxes were supposed to stay for two weeks while relatives reconsidered.

They stayed for eleven months.

I sent messages every few weeks asking people to collect their things. The replies were variations of “soon,” “I need to check with the kids,” and “do not throw that away.” Meanwhile, I parked outside and scraped ice from my windshield all winter.

In March, I gave the family a deadline. Anything left after April 30 would be sold or donated. Nobody objected. My aunt collected one lamp. The rest remained.

I spent two weekends sorting, cleaning and photographing everything. I held a yard sale, then listed the better items online. After fees, I made $640. Unsold clothes and household goods went to a donation center.

The trouble began when my cousin saw a photo of the sale table and recognized a set of vintage mixing bowls. I had sold them for $90. She said she had always intended to take them but thought they were still buried in a box marked kitchen.

I reminded her about the deadline. She accepted that the bowls were gone, then asked when I planned to divide the proceeds among the family.

I said I planned to keep the money as compensation for storing and selling everything.

Nobody had agreed to that. My deadline message said “sold or donated,” not “sold for my benefit.” My relatives assumed I would record which items belonged to whom and distribute the money. I assumed abandonment meant the items and the work became mine.

My uncle says I can deduct a generous amount for labor but should not keep all $640. My aunt says storage was the family favor I offered when Grandma moved and I cannot invent rent afterward. My partner thinks the money barely compensates me for losing the garage and managing dozens of messages.

I can identify only a few original owners now. Most boxes were mixed during the first sorting day. Dividing the money would require another argument about whose blender, frames or dishes produced which amount.

I gave clear notice and did the work. I did not give clear notice that I would keep the proceeds.

AITA for treating the yard-sale money as mine?