Guild Wars 2

Okay, so I just opened 944 of the Divine Lucky Envelopes with 658% magic find.
Maybe you’re interested in the results and if it’s worth it.

944 opened, 658%mf
->
31 rare monkey backpieces
2 exotic monkey packpieces

2685 blue essence of luck (10 luck)
887 green essence of luck (50 luck)
526 rare essence of luck (100 luck)
244 exotic essence of luck (200 luck)
12 legendary essence of luck (500 luck)

981 Golden Monkey Figurines (-> 871G 91S 28C)
35 Ornamental Golden Trophies (-> 311G 10S 80C)

590 Lucky Draketails
72 Lucky Prismatic Rockets
178 Lucky New Year Fireworks
48 Lucky Guild Fireworks
40 Visage of the Great Monkey Fireworks

275 Fried Golden Dumplings
93 Delicious Riceballs
34 Spring Rolls
26 Steamed Red Dumplings
24 Sweet Bean Buns

So, all in all, I paid 944 gold (got all through my alt accounts, no tp involved) and got back 1183 gold through junk items alone.
I sold most of the rest (kept a exotic backpack for my skin collection) on the tp for another ~54 gold.
Net profit was around 290 gold, so around 31 silver per envelope. Selling them on the tp brings maybe 18 silver at the moment.
It may be more profitable to store them or at least the involved backpacks (the rare one from last year is at 5 gold now), but for me personally it’s not worth to wait that long (plus the skins aren’t stackable).

Quick magic find reference:
150 through silverwastes event buff
200 through boosters (festival booster +100, mf booster +50, item booster +50)
10 through guild item research
15 through hero banner
30 through sharpening skull
40 through Chocolate Omnomberry Cream (you need a boon)

here is post of a guy who opened 15k envelopes.

https://www.reddit.com/r/Guildwars2/comments/43o3j7/so_i_opened_15000_divine_lucky_envelopes_here_are/

Great stuff. It probably needs to end up on the Wiki