First thing I would do is check the drain holes in the pot to see if you can see roots, and if not, gently slide the plant out of its pot to make sure it is well rooted. Or ask the Nursery lady to do this for you. Brugs start so easily from cuttings, you want one you're buying already potted to be well established. It will probably need to be re-potted soon after you get it home, though, if it is. These things grow FAST! I once went through 4 re-pottings for a brug between April when it arrived as a 10in. cutting to September when it was a 4ft. by 4ft. crazy blooming shrub.
Second, are the leaves big, clean and healthy? Run your finger gently along the underside of a few leaves, then inspect your finger. If you see a yellowish stain, check the leaves for tiny spots and the leaf axils for tiny webs that will indicate a spider mite infestation. This is not something you want to take home! Tell the lady if you find those! Then maybe go back next week to see if she's taken care of it - but don't buy it for a couple more weeks because it takes at least two treatments to (mostly) eradicate spider mites. Then, keep a close eye on your plants because they could still come back.
