They are few and far between, with all the new home gyms
For dumbbells, I'd look into adjustable, assuming you want a range of weight. It makes it super easy to do circuits, and really reduces the "footprint" with several weight increments vs. single weights. We scored a set of these by Core Home Fitness:
Get our adjustable dumbbell set and easily change the weight you're working out with. This weight set has ten pieces from 5 to 50 lbs. in a single dumbbell.
www.corehomefitness.com
Very well reviewed, very compact, quickly adjust from 5-50 lbs each, in 5 lb increments (set them on the base, rotate the grip). They're always "sold out", but what they do is offer a lottery, where you register, and they pick X number of people to offer them to, of course, some people get them just to resell, so you'll see them for 2-3X the retail price on FleaBay. These are mostly sold direct AFAIK.
There are also products from Bowflex (SelectTech 552) and a few other major known brands that also get very good reviews, consistently recommended. I'd be careful on some no-name-brands, I've read a few reviews about failures, which could potentially leave a big lump on your head. BowFlex also makes an adjustable kettlebell which is pretty cool.
A good brand resistance band can be a good option too, I still prefer actual weights for many exercises, so we use our bands to compliment the workout, do things not as easily done with weights (like overhead lat pulldowns). GoFit is a solid brand, good components (clips, grips, anchors), good range of options, they show up at your usual suspect online retailers, we scored ours from Target.com