Ember is my favorite frame in the game by far but nah, I'm good on dropping 600 platinum for her.
Watching Ember Prime's price change over the years has been fascinating to me.
Ember Prime was my first ever prime, I bought her full set for like 35p or something a few month before we even knew that she was going to be vaulted. Now part of the reason why ember prime is expensive is mostly because of her BP, it used to come from Orokin Derelict Survival on rotation C I believe. Most people weren't really stockpiling those but would rather just farm the BP so they could sell the rest of the parts for at least SOME plat. Other than that, Ember P parts were basically baro fodder because they were plentiful. The other reason why she's expensive now is because Ember used to suck something serious so none of the parts were stockpiled by people expecting a rise in price.
Like holy fucking shit she used to be so bad. Her 4 which is now known as this passive murder aura in star chart missions that you leave on and for minimal energy per second kills like 8 dudes every second before you can even see them. Well back then not only did it have high energy per second drain, but the thing also had a max duration so you had to keep recasting it. This meant that to build for her 4 you needed a lot of duration which meant you couldn't get much range, which meant you couldn't get much strength. On top of that the firequake augment also wouldn't be released until a few months from when she was about to get vaulted, so basically if you were building for her 4 with high duration you might as well build for her 2 which offered some CC for less energy cost.
Ember Prime was to be vaulted on October 6th 2015
On October 1st something crazy happened.
World on Fire now drains 3 Energy and has had its maximum duration removed.
That single change basically turned ember into the frame people love today, some people went crazy and started framing her BP but few managed to do stockpile enough in the short time they had. As soon as she was vaulted her price went up to about 300p and has been climbing ever since.