1995 Kia Sportage rear end repair

Drive Train Axles Bearings problem
1995 Kia Sportage Four Wheel Drive

I am thinking about purchasing a 1995 KIA Sportage for only $1,000.00, but the owner says that she took it to the mechanic and he said the rear end would eventually go out. I want to know how much this will cost me to get fixed, and since the bb value is $6,000.00, will it be worth it to do so?

Thank you so much,

Joel