Yes, 60-year-old King Airs can be picked up for a song.
Consider that Beechcraft started building King Airs in 1963 and more than 3,000 have been built. More King Airs have been built than all of the other light turbine twin executive transports combined (BAE Jetstream, Embraer Bandierante, Cessna 4??, Piaggio Avanti, Piper Cheyanne, etc.).
A DZ can pick up a 60 year old King Air for a song, barely more than the value of the instrument panel and the time remaining on the engines. But long-term maintenance is far more expensive on King Airs with their pressurized cabins, retractable landing gear, de-icing boots, IFR panels, etc. King Airs also require hard-surfaced runways 3,000 feet (1 kilometer) or longer.
All those extra systems also make King Airs more complicated to fly, hence not suitable for freshly-minted commercial pilots. Complex airplanes are also more expensive to insure.
When my boss bought a 1960s vintage King Air, I asked him why he did not buy a simpler Cessna Caravan and he replied that his 1960s vintage King Air was the most that he could afford. A few years later he was complaining about spending $45,000 on a landing gear inspection due every 5 years. A few years even later he crashed the King Air because of some neglected engine maintenance.
Bottom line, King Airs are the cheapest turbine jump-planes to purchase and you get what you pay for.