I can't really say about Vendor sales, as much as what I personally keep to use...
Ones I personally have kept, over the different incarnations of ToT, were the flutes, Gloves of the Sun, and Ancient Samurai Do.
The Gloves are a nice alternative to Stitchers mittens (especially if you're not playing an elf), and while they have only 18% LRC, they have LMC 5% and HPR.
The flutes are very good, but one has to actually PAY ATTENTION when using them, to not accidentally break them by taking them to 0 charges. They really need to alter them to not break, and be like the Hammer of Hesphaestus & Jacob's Pickaxe.
The Ancient Samurai Do gives +10 parry, and good resists, but what I see value in isn't necessarily what others see.
If you have a macer, keeping an Exiler for your your own use would probably be good (especially if the macer has Bushido, and therefore is better off using a 2-handed weapon).
Most of the rest, I'd turn in.