Britney Spears -- How To Make Money In this Housing Market

Britney Spears could get $1.5 million more than the asking price of the house she's selling ... not bad for someone who's been under a conservatorship for 4 years.

TMZ broke the story ... Britney sold her Beverly Hills estate for $4,253,000 ... which is pretty impressive, considering she was asking $2,995,000.

But it gets even better for Brit. Because of the conservatorship, the sale must be approved by the probate court later this month, and during the hearing anyone can go before the judge and overbid the buyer.

We just got our hands on court documents, which show that the minimum bid the judge will accept is $4,466,150.

But here's the bad news. Britney paid $6.8 mil back in 2007. Still, all and all, she's doing better than most in this market.

As we first reported, Britney will be moving into a rental with her 2 kids and her fiance Jason Trawick ... until they find something to buy.