Quote: "ngdawa"This isn't really that hard to understand, is it?
You bought it: Write the price you paid
You swapped it: Write nothing
It was a gift: Write nothing
You found it: Write nothing
You got it in change: Write nothing
You made an transaction to get it: Write the amount you transfered
It really simple, right?
You can read more about Market value and what it means here: https://en.m.wikipedia.org/wiki/Market_value
Sure, from an alghorythmic point of view it's really simple. When you know how it works. And we know how it works because a) we have been here long enough to get used to it, and b) we read the forums. What about the people who haven't and don't?
From an User Experience/User Interface point of view, it's not so simple.
Imagine you are a new user that doesn't know how Numista works. You have just made an account and you want to input your very first coin.
On the coin page, it says how the value is calculated: "evaluations by Numista users and sales realized on Internet platforms". What if I bought the coin in a fair -so it's not an Internet platform-, I paid 20 cents, but my evaluation is that it is worthless? What do I write according to the instructions? 20 cents because that is what I paid, 0 because that's my evaluation of the coin, or do I leave it blank because it was not bought on an Internet platform?
Now, I'm going to input my second coin. A friend brought this coin from a trip abroad and gave it to me as a present.
Also, nowhere it says that you cannot, or should not, write 0. In the input popup, the label is "buying value", not "market value". There is no mention at all, in no place, of "market value". Fine, the buying value of my gifted coin is 0, so that is what I am gonna write. And then I hit save, and the value disappears without any explanation. If it's the first time I input a value, what I am gonna think is one of two things: either I did something wrong, or the website is not working properly.
So, if you don't want me to write "0", either tell me somewhere, or let me check a "gift/spare change/the price is not known" box.
I love the value system, but it needs some adjustments.
You can read more about
User experience and what it means here:
https://en.wikipedia.org/wiki/User_experience
Referee for Burundian and Estonian coins.