I was testing the resist requirement at A4 with my shield and DW monk.
In the intensive fight in swapping some items for various setups, I didn't pay much attention to the rares and rubbish items collected. Maybe I have given a just identified rare brace an extra right click wihtout my knowing it, I then sold all the craps en bloc to the merchant with a series of rapid right clicks.
I found something wrong after a while as I was fighting with less resisitance and down by 6CC. When I rushed back to town, to my disappointment, the brace is gone forever as the merchant only keeps the last 12 items sold to him.
I am pround of this brace, which I bought from AH quite sometimes ago with less than 1M. When I checked for a replacement at AH, there is less than 5 braces with 6CC, +100 dex and my light resist. The magic find on it is okay, but what I miss the most is the godly +12k to life globe, which I believe can only spawn to level 63 items. No brace on AH can match, even the best one asking for more than 30M.
Now I fight with my last used 4.5CC brace and with some other adjustments, my CC is down to 36%.
To make this up, I upgrade my sword to increase my DPS to 42k for shield and about 50k for DW.
That happend to me one time. Only I noticed it right away but sadly I salvaged the item not sold it to merchant, so it was gone for good. Good thing for me the item did not worth more that a few millions. Huh!
Since then I always double check my DPS after selling to merchant, and I seldom savage.
lol last time, i duno how i managed to accidentally drop my glove on the ground in tower of the curse, then when I look at my character sheet, my dps decreased a lot, i duno why, so then i went all the way back and search for each level and finally found my gloves, really expensive ones that i bought off RMAH for $25, like 190 dex, 50 fire res, 9 ias, 8.5 crit
Happened to me to a 3 million glove once.
Exact same thing. Game was a bit laggy, had an inventory full of items to ID, extra right click, equiped a crappy archon gloves instead of mine, sold all the junk and VOILÁ...my gloves were there too..
And it was a damn nice piece, had 144 Str, 80 Vit, 10 % Crit Chance, 20% Magic find and low All res (prolly around 40 if i remember right).
I had bought it like 2 days before.
Now to avoid that from happening i Dyed all my gear white.
If i see a piece of any collor but white i check it all.
And also made a habit of checking my gear prior to frenzy selling stuff.