Nice, keep the data coming! I'll try to update the main tables as often as possible.
TongTong that's a really interesting one, I didn't expect gold prenerf value to be below current blue minimum (maybe I am wrong about current blue?) But damn, that value is absolutely retarded, why would anyone keep such a shield when there is +30hp unconditional available 
Sure, adding prenerf ranges is a good idea, I'll put it in the op. I suggest we limit that section to inherent mods (2, 3, 5, 10, 15, 20, 30, 45, 60), because what would be the use of knowing salvageable prenerf mods by rarity. Pleikki I'm not sure what you mean by 'cheating', but would that solve it?
I'm totally dependent on prenerf collectors for that section, though, as I don't have enough of my own to get a clear picture. Please share what you have if it's not yet in the tables.
Thanks!
1a tall shield
10a inscribed staff
20a jeweled staff
2a celestial staff
5a jade staff
Blues are always single mod
Oldschool blues are always single mod, inscribable can drop with 2 salvageable mods. Also, OS blue is the only rarity that can contain 'highly salvageable' or 'increased value' whereas those can be on all inscribable rarities. In my experience, os blue has one of those two mods almost half of the time, so the even chance of a good blue singlemod is quite low.
52 - 5e
54 - 20e
they nerfed drops, not all collector items
These q6 bows seem to be the only ones that are above the currently observed max drop, though... That makes it interesting. As you said, we cannot rule out that q6 13-25 (or maybe even 14-25) can still drop. New max stats are still being reported even in 2020, so I'm gonna check my q6 bow drops from now on 
Here you can find on minimum-maximum mod values, sorted by rarity and location. The value ranges depend on mod bonus type, not on item or component (mod/inscription) type. All the listed values have been observed and confirmed recently, except those with a question mark ('?') behind them. If you have any questions, or see a mistake, please let us know.
An incomplete list of observed pre-nerf inherent mod values is also given at the end: only the minimum values per type are shown, because the maximum values were the same as post-nerf (except maybe in beta/very early game). The pre-nerf table is preliminary and incomplete, please contribute new values if you can.
q9 earth staff retract wrong skin
Double imperfect and common skin is too bad, personally I would merch this. Still, 15/hsr20 is a wanted combo I believe, so maybe you could get 5e for it with some luck.
I don't know who jordan is but 150e is an acceptable offer. Will sell in 36 hours from now if no further offers.
q9 crude 30e 50e
edit: simultaneous post with pyro
bump, some new shields and mods
Wish I knew how many more low level chests I have opened for Q8 runs..
You could estimate it for yourself by looking at your lucky or wisdom ranks (it depends on how much chest running contributed to those titles, which is something each person can only estimate for themselves without proof).
For lucky: assuming you opened the majority of non-max chests with maxed ranks, the rule of thumb would be one Pongmei NM chest per 195 lucky points (250*0.78). Of course you have to subtract other sources of lucky points: boardwalk/clovers/wintersday finale. Also the numbers are different if you ran a significant number of lower lvl chests.
For wisdom: This is more difficult because you have to subtract points gained through farming, and add unids you sold. If you are able to do that, then it would depend on chest drop rates. I'm not a chest runner, so could an experienced chest runner perhaps share their data on the average drop rate of golds vs purples from 450g or lower chests? xD
Btw here are my recent ranks, I personally estimate that about half of my wisdom comes from Nolani 
Alright yea, so for purple os items, max mods for your examples would be 14^50, +40wE (or maybe +41, haven't seen that one yet), +9vs, etc according to the table.
Edit: see here.
I could explore that spot just now by standing in the spot that is closest to it (see screen) while pressing W for at least 2 seconds.
uw/fow use tyrian table
I have never seen eternal/shadow shields with +x vs creatures other than undead (talking about currently possible drops, not prenerf)?
jeweled staff 50e (which skin is it, metal or twin serpent?)
Some believe that the governing factor is time
To me the effect of instance time became very clear when I was running the unlocked chests from Charr Reinforcements. One test showed that opening them asap after load yielded 11 items in 10 runs, while opening them after waiting 1 minute in the map yielded 42 items in 10 runs. These chests may be different from enemy npcs (but they are also different from locked chests, because they can drop between 0-3 items each), but it is possible that this is a general mechanic.
The next question is, does waiting before killing actually result in a higher yield? That depends on total run time and average increase in drop chances.
Btw, are the runs you're logging during favour or not? Either would work I think, as long as all runs are the same.
Just running the -image command once before starting with texmod worked for me. Thanks for the suggestion, Zan!
#5 10e
#27 30e
The gate can be glitched.
