Unholy is the main expert on prenerf greens but if you need another opinion I agree with him : Kepkhet and Wenslauss are common and in the 1a range. Milthuran and Stonereaper are a bit rarer but still nothing exceptional. You should definitively check if you have other prenerf greens (the current prenerf green list isn't exhaustive and new one are found form time to time).
For the other items :
- Spiked axe Q8, not the best mod on core skin I think those are in the 5/8a range.
- Celestial shield is not that great, non max and mismatching mods 1/2a maybe.
- Hand axe is a fun one. 15% while hexed is cute (the max would be 20% while hexed). I'm interested in it so I won't price check it.
- Q7 spatha all the Q7 max are very valuable even if they aren't max mod. Wait for more opinion on this one.
- Magmas shield and Q8 wand, also valuable items, wait for more opinion on those.