in general if you hit warlock the cheap way is to have one mana item at level 1 and one int item, this causes both items to be like 20 fg max. If you go full int you don't have enough mana to even cast till kill enough to reach level 2.
The 22 int robe is 3 off perf, which sounds close but very common at that level, perfect is generally 200-400 fg, 24 int usually more like 50. So you're looking at about 20 for a 22 int.
As i mentioned, mana is ideal and is also good for offcast, however i'd be surprised if this gets any more than 20. would expect 5-10. Again it's too common.
If you can get the magic combo of int + mana similar to that ee + mana charm you found and have both stats near maxed, again you can get thousands for it as not enough exist and most of us here will hit warlock if we're active.
aight thx alot

This makes the decision to keep these pretty simple. Both seem like items i'd have to buy
when i hit warlock and on the other hand are pretty cheap so selling them now wouldn't make a big diffrence