Scott Disick's personal life may be in tatters -- but the LD is still looking smug as a bug in a high-priced Persian rug.

After meeting up with his ex Kourtney and son Mason yesterday, the Lord stopped by Rite Aid in Calabasas,Calif. Perhaps he'd run out of condoms or there was a Valtrex prescription that needed picking up? Who knows?!

The 32-year-old was outfitted in one of his fave plaid shirts, dark skinnies and a pair of loafers. A classic LD uniform!

For the Rite-Aid stop, Scotty rode up in a brand new 2015 Mercedes SLS GT Final -- the last of the company's SLS class to be made -- which costs a whopping $205K, which is the same car he drove to meet with Kourt at the Beverly Hills Hotel earlier in the day.

If our ex was threatening to take full custody of our three kids -- maybe we wouldn't be so showy! Maybe try a Prius, Scott!