How to determine the value of car models

I am dedicated to play car model.
I know you must ask is the ratio of alloy car models, because this car model is the more common market, but also easier to buy.
Determine the value of such a model, together with the following methods:
1. What is the factory produced, what brand (for example: Japan Kyoto Business);
2. Whether the production of refined car models, all parts of the scale is correct; shell spray paint it bright and smooth interior. Windows. Wheels mimic the texture is the very place;
3. The most important values embodied in the model is the first run (the most valuable, at least 5 more than 1000 yuan, or 10,000 to 100,000 or more are not surprising), or limited production (more valuable, probably between 3 1000-20000), or the mass production of the (general value, are generally ranging from 2 100 to 2 thousand, many auto 4S shop car model presented is 2 100-1 1000 gift model);
4. Model is worth the ratio of reference on the one hand, most of the alloy car models available in the market are 1:18 and 1:43, and 1:12 and 1:24 is relatively rare.
But I want to say, no matter how much money you are, and the final value of car models in their own hearts! Is the extent of your loyal love!