my opinion on those items. this is meant as constructive criticism to give you a better idea of what's worth putting on a vendor and what will most likely not sell.
1st group:
# 1: the 125 str requirement is a problem - one curse by a boss monster and they will drop to your backpack in most cases leaving you rather vulnerable. I usually don't bother with those and just put them into the unravel bag.
# 2 lacks decent resist to be worth putting on a dexxer suit. only worth it if you have a suit consisting of other artifact lvl pieces with overcapped resists (hard to get with the rare combination of 8 lmc and 8 stamina on each piece).
# 3 and 4: caster mods but since they're not medable these items are only usable by mystic mages
# 5: decent item for a caster suit
# 6: could be an ok piece to get some extra resists on a caster suit that already has 100 lrc and could use the 10 lmc. really depends on the other items you wish to combine this with
# 7 - 10: these items could make sense in some very special circumstances but I don't see where I would use those over crafted jewellery with the exact mods that I want
# 11: pretty useless because it lacks dci to make it worth using on a dexxer and fc/fcr to make it useful on a caster. I would just unravel that one.
# 12: the 1/4 is nice but for a pvp mage this item lacks dci. I could see this work for a pvm caster though.
2nd group:
# 1: meh...the 2 lmc is not enough unless you have several pieces with overcapped lmc to get to 40+ lmc on a dexxer. the can not be repaired and luck -100 suggest this should be used on a pvp suit but again the lack of lmc is a problem here.
# 2: again not enough lmc but in this case easier to make up for it with overcapped pieces...
# 3: pretty useless because it doesn't have the minimum mods required for either class.
# 4 - 6: obviously 150 luck is nice, especially if you enhance for 190 luck. the elves only limitation on # 4 will limit the range of customers a bit and the same goes for the low resists and lack of other useful basic mods like lrc, lmc etc on all. # 6 will be limited to chars without meditation.
# 7: an ok item for a chiv dexxer maybe.
# 8: nice overcapped mods (10 ssi, 18 sdi) but unfortunately all over thep lace. lacks hci/dci to be useful for a dexxer and lacks fc/fcr to be useful for a caster. unravel material...
# 9: nice item for a chiv or necro dexxer
# 10: completely lacks lmc. unravel material
# 11: 125 str requirement problem - unravel material
some general remarks:
jewellery with + 20 in weapon skills seems nice but in reality people tend to have 120 weapon skill because you can not reliably supply items with the exact mods you need and + 20 in the exact weapon skill on top. so unless these jewellery pieces have perfect mods beside those +20 skill points they just don't make sense on Siege.
armor pieces for dexxers should have 8+ stamina and 6+ lmc along with decent resists to be useful. it is much more complicated to get to all 70s, 40+ stamina and 40+ lmc otherwise and will make it even harder to replace single items on a suit when needed.
jewellery for dexxers is usually easier to craft because you get to decide the exact mods it will have. so unless the looted piece has the perfect combinations (hci,dci as bare minimum - ssi, +stats, dmg, ep etc. on top) one is usually better off farming the ingredients required to make the exact pieces you need. The exception being ssi pieces since that can't be imbued on jewellery. Clean ssi pieces with no other mods (or with additional mods that dexxers actually want) will sell well! An additional problem is that dexxers wear out their jewellery in pvm much faster than casters, thus the antique property can be a problem.
hope this helps.