He captioned the image of himself in a large room: "This is just my shoe closet part 1."
Bizarrely though, there don't appear to be any actual shoes in the closet.
Mayweather, 42, officially walked away from the ring in 2017 after beating UFC star Conor McGregor in a lucrative crossover bout.
But the American great — nicknamed Money — returned just a year later in an exhibition bout against Japanese kickboxer Tenshin Nasukawa and earned $13.5m for the two-minute fight.
The undefeated ring legend then announced in November that he is "coming out of retirement in 2020" to work with UFC boss Dana White.
It left 50 Cent to claim the world's richest sportsman has somehow blown his cash and needs a comeback fight to recoup his wealth.
Jackson, 47, told Hot 97: "I think he got to right now because the money's gone.
"It's fight, get the money, spend the money, fight. With the lifestyle that money's gone. Trust me.
"Now it's like if you call him he'll be at your local nightclub because he needs that action right now."
Mayweather's spending habits are notorious.
He has a car collection worth millions that includes FOUR Rolls Royces and two Bugattis — both worth in excess of $2m each.
Money also loves his bling and reportedly spent $2m on a diamond encrusted Hublot watch during a shopping trip in Dubai.
