Hotwheels Car Rating Defination

i have this idea of quantifying the value of each hotwheels car that i have so that i can give some sort of ranking to it to determine which car is the hottest among all. hence, i came out with these category to rate my hotwheels car.

1. Design
2. Colour/Tampo
3. Weight
4. Popularity
5. Rarity

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each category is rate from 1 to 20 (1 being the lowest and 20 being the highest)and the maximum score will be 100%. here are the defination that i've given to all the category:

1. Design
this cover the overall design of the car. from the shape of the car until the wheels of the car. it's my perception on overall outlook of the car.
2. Colour/Tampo
the overall colour of car, the tampo design and the painting detail on the car is cover in this category.
3. Weight
this is very straight forward. the heavier the car, the higher the score.
4. Popularity
popularity mean whether this car is highly sough among the collector. i'll rank this base on the collector feedback or haul pic that collector post in the forum. it can be determine by how fast the car will disappear from the rack but this is not an absolute answer to it. a good example is the blue colour datsun bluebird. it was very popular among the collector, but it still can be found on the rack in many places due to over supply in the market. so this car will score a good point in popularity, but not in category below.
5. Rarity
this determine by the level of difficulty for collector to obtain this car. eventhough a car might be easy for me to get but it doesn't mean the car is not rare. i'll be looking at a few factor to determine rareness. wave distribution is one, and another one is the number of pieces of that car that came in one carton box. in the case where i'm not sure the rarity, i'll just estimate the rarity.

i know some of the category are very subjective cause some people may see the thing differently. well the rating given is purely base on my own opinion and perception. it's just a guide for me to find the hottest car among the hot. :D i will create another post later to consolidate and summarise all the cars that i rate, and from there i shall find my ultimate 'hot' cars of hotwheels! :D

btw, if you have any suggestion, please feel free to leave some words in the comment section ya. :)