Accurate value of your watch collection on chrono24

[amphr1]

For those who tracks the value of their watch collection, if only so u can see how much you've spend on this hobby and what not, how do you set the condition so that the price is accurate. If I bought the watch new, it is unworn when I bought it. There's also a checkbox that say "I own this watch". But unless I bought the watch and put it in a safe, should I always select the condition as pre-owned? I mean I've worn it. Because to me chrono24's estimate of value is VERY optimistic. It's as though they use the listing price rather than their sold price to calculate.