This is exactly what I do. Creating imaginary wishlist. I think 1stdibs have the best selection for highend and unique jewelry among other reseller websites. And one of a kind bags!
I mean, I also love fashion (1stdibs also has a splending collection of vintage designer dresses!), but if presented with the option to spend a few thousands on a high end bag or on some bling I'll go with the bling. I don't know what it is, since I turned 30 I have such a need for security...I wonder if it stems from my grandma having to flee her home during the last days of WW2 as a young teenager because I sure have never had an experience that would warrant that. I can always stuff a handful of jewelry in my coat pocket and go if need be (not that there will be the need, I live in safe Middle Europe!).