More bad news for unemployed NFLer Terrell Owens ... TMZ has learned the former football star took a major hit on his Georgia condo ... selling it off for nearly HALF of what he paid for it.

T.O. -- whose finances have taken a turn for the worse as of late -- has been dumping his real-estate collection right and left (both his Miami and Dallas condos were already sold) ... and now he finally unloaded his 1,060-square-foot Atlanta crib.

The deal wasn't so great for T.O. -- he purchased the pad back in 2005 for $324,600 and then listed it in 2011, where it sat on the market for over a year. He finally unloaded it earlier this month for a mere $180k.

But it's a steal for the new owner ... the cool digs is rockin' 2 bedrooms, 2 baths ... and primo amenities like a 24/7 concierge service, rooftop pool, fitness center, yoga studio and a club room -- with Xbox & Playstation.

Maybe T.O needed a little less "Call of Duty" and little more time with the pigskin.