LOL... I guess I am an old fool for standing in the sun all day trying to sell a table full of "low-end crap" at the swap but - more often than not that "low-end crap" is your only profit in a unit. Sure I would rather spend my time dealing with antique store or art gallery owners but the truth is most of what you find in these units is regular household items.
I, along with more than a few on here do this part-time...hubby has a very good job in the oil patch. I go to the auctions alone or with my 19 year old daughter, hubby goes when he can but he puts in 10 hours a day 6-7 days a week, I also have to empty the unit on my own, sort, clean, repair, do dump runs (many, many dump runs!), write E-Bay, Craigslist ads, run items to be appraised, pack totes for the swap or the antique mall or goodwill.
You get very, very dirty. You have to work in the heat, cold, rain. You have to deal with mouse/rat poo/pee, dirty undies, porn, spoiled food, needles, etc., all to find what you can to re-sell.
You also manage to learn a thing or two about all sorts of things....I now know how to re-finish furniture, I can make windchimes out of some of the most worthless junk, I can make broken china turn a plain flower pot into something I can sell at the swap, I can turn an old lamp into a birdbath. If you are not willing to work the very last penny out of every unit you will not make it. Prices are higher than I have ever seen them just to buy a unit and if you are not willing to swallow your pride and sell that toaster oven you might as well stay home and just watch the shows.
As craigls said below....I too value and appreciate the time I spend with my daughter at the swap or cleaning out a unit. At 19 there is not much she likes to do with dear, old mom so I take what I can get before she heads off to college.
BTW, I am very humble......yep, just an old, humble redneck granny!