Diecast Model Car truly unique about diecast model cars is the supreme resale value. Many, many people build these models and sell them to others as collector’s editions. If you want to make money with your hobby, this is a great choice. And, it really isn’t that hard.
When you first start out with diecast model cars, start with something simple. Typically the scale 1/43 is the “collector’s scale” but for your first model, try any size. You will likely treasure this first model anyway and will not want to sell it.
As you search around for diecast model cars, constantly look for bargains. Don’t buy the first thing that fancies you. Consider it but look for a better price elsewhere. Especially if you are considering a future business in selling your models, you obviously want to buy low and sell high. Becoming a part of your hobby store community is a great way to learn where and how to shop for your models.
Even if your long term goal is a business, your short term should always be your pleasure. Pick cars you love. Don’t worry about sticking to one genre. Pick different eras, get different brands. As long as you enjoy building the diecast model you will make it perfect. And when it comes time to sell, your buyer will only be interested in a particular car, not what other cars it shared a shelf with.