I love the junkyard! Half the time, I pick up everything there, call the repairman, and then sell it all. I usually make between 1000 and 2000 on a trip.
I have picked up expensive radios, TV's, Sim Life Goggles, expensive washing machines and dryers (in fact, that's how my legacy family got their washer/dryers), expensive stoves (again, how my Sims got one) a fortune cookie maker, cribs, tables and chairs, you name it. But I think the best thing was the bookshelves.
My best find: My Sim picked up the $700 bookcase (the glass shelf one) and it had all the skill books on it! Levels 1-3 in charisma, cooking, inventing, logic, handiness, and gardening! I think it may have been a bug because it never happened again. I keep picking up bookshelves, though, because the more expensive ones come with lots of books my little bookworms don't have to buy.
*scurries off to the junkyard to look for more stuff*