Ok, after just talking to you (and hearing how many shamefully low "private offers" you're getting by PM) I am posting here, too.
All of my guesses are pretty shaky unless specified!
r9 Comm Amethyst Aegis - not at all up to speed on the prices of these lately, but I think they're well under 100k these days.
r9 Str Eternal Shield (-poison and 45wE inherent mods) - I don't think -poison is a very popular mod on shields these days. I would think this one tops out ~30-40k max.
r8 15vH inherent Celestial Longbow - Very unpopular mod. The only market I can see for this bow is someone making a collection who needs one of each damage mod. I would think no more than 20-30k.
r7 Str Celestial Shield (+42/-2 wE inherent mods) - Tricky! The r7 (on max armor) makes this very rare indeed. The imperfect hp mod will hurt the price, but it's still worth a lot at auction most likely. I am taking a rather shot-in-the-dark guess that it's worth at least 150-200e right now ... could be A LOT more, but I'm just not at all sure how to PC these.
(It's definitely worth more than the pathetic 35k offers you told me you're getting by PM - smart of you to know not to trust those.
)
r9 insc Hornbow - Current market value depends on skin. Check wiki to see if it's the dragon, stoneshard or Mursaat skin. If dragon or stoneshard, I think 5-10k. If Mursaat, I'm not sure but I think at least 30k (might be higher, haven't looked)
r7 Tact Celestial Shield (inherent single mod -disease) - This one is even trickier.
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With the single and rather useless (compared to other shield mods) mod, I honestly can't see why this has value. But there very well may be r7 collectors out there who would pay something for this. Were it mine and I had no other info to go on, I'd put it in a Sell thread with a s/b of ... ~15k and just see what happened.
r9 Dead Sword - these go for ~5-15k lately I'm fairly sure.
I will keep my fingers crossed that you get more opinions!
Cheers & GL!