Well I'm afraid I don't have a list ...
But I can say it's not as random as it looks, for me anyway. Once I got over level 5, without her asking for expensive things (3k+), I was sure she wouldn't ask for anything worth over 2k on the following levels, up to levels 34-35.
And that's the way it happened.
But some other time, she started off by asking me for items worth 4k, 5k on quests 3 and 4, and kept asking for those types of items and sometimes more expensive than that, up until level 30, when she finally asked for an unbuyable.
But I think she always asks for rarity 99 items on level 35, so you're pretty much doomed from the start, unless you're lucky and have the item she asks for. Or know someone who does.
