Is there a new Hongqi H7 available for purchase?

It's all gone, but there should still be a bunch in stock, though not sure how long they can run. Cars can deteriorate just sitting around. This car has good value for money in the second-hand market, not expensive. You might consider getting one with similar mileage and age.

New cars sitting in inventory, priced around 10-15k.

It's definitely not possible to buy a brand new car, but you might find a nearly new one in stock. However, you probably won't be able to customize it. [I want some peace]