I've more than two dozen lamps, all models and marques and my beater, the one I most use, is a 246B. It was relatively cheap, it lights things up and if it breaks or gets stolen I won't lose something I can't replace.
Now, that said, I've heard collectors call them Friday afternoon lamps, because they're thrown together like the assemblers were in a hurry to get their first pint of the weekend. Give them a look over, make sure everything is there and tightened down like it should be and they're perfectly serviceable.