Speaking of treasure, I will be wanting wishlists from everyone. Feel free to post them here or PM them to me.
If you want specific items, I suppose I can come up with that but in general...
weapons
Gwenn prefers upgrading her existing rapier (which has a great deal of sentimental value to her) over acquiring a new one. Even if she finds another rapier sufficiently powerful that she feels she has to use it instead, she will only use it until she can upgrade hers (quite possibly selling the other sword, disenchanting it for residium, or transfering its enchantment to her blade).
She keeps a low-level enchanted dagger on hand for a throwing and off-hand weapon. She wouldn't be actively looking to upgrade this (not worth a parcel, but if you want to drop some random low-level treasure, a +2 dagger with throwing-oriented enchantments is something she'd keep, or buy if she had enough cash that it was a minor expense).
armor
Gwenn wears leather armor. She prefers armor abilities that help her avoid conditions and/or ongoing damage. She wouldn't be interested in another suit of +3 armor, but if +4 armor (presumably feyleather) becomes available, that would be different.
neck slot item
Gwenn doesn't have any strong preferences here. As with armor, she prefers items that help her avoid conditions and/or ongoing damage, but currently wears a basic amulet of protection +3.
other items
Bracers of Mighty Striking (paragon tier) are probably her highest priority after upgrading the 'big 3'. Beyond that, she's interested in items that help charging, stealth, avoiding conditions, and 'general adventuring' (see her instant campsite, bag of holding, etc., though she tends to just buy relatively low-level items for that).