I go through Amboy all the time. It's a good train-watching spot too. There is a boarded up motel and school. There's a post office but I don't think it's used anymore. You can still drop off mail in the mailbox. There's also a gas station and 50's era diner. It's been used as a set in at least a couple movies, and the big "Roy's" sign out front pops up in movies and commercials now and then. I've eaten at the diner a couple times, good burgers and shakes. It's been a few years though, don't know what it's like currently.
Most of the town is on the north side of the railroad tracks. On the south side are some minor railroad structures, a couple old houses, and a mineral processing facility. Out on the nearby dry lake there's a couple salt mining operations.
Up until sometime in the early 90's, the town was owned by a colorful character named Buster Burris. I still have his business card. Across the top it says, "Used Cars - Land - Whiskey - Manure - Nails - Meters - Fly Swatters - Sweepstakes Tickets - Racing Forms". The lower half of the card says, "Wars fought, Revolutions Started, Bridges Destroyed, Governments Run, Uprisings Quelled, Tigers Tamed, Bars Emptied, Virgins Converted, Computers Verified, Orgies Organized".