So I just started playing this game about 3 months ago and had already read many posts about the large quick sell, so I kept track of mine. But here's the trick, at least I think it is...first off I built up 500000 coins before I bought first pack, and I generally spend about 150k to 200k on gold and silver players to exchange for medals each time I attempt quick sell. Thus I usually have enough to get at least 4 to 5 or 6 large quick sells at a time, or once a day as max daily reward seems to be reset daily and ranges from 25k to 1000000 coins. I have never received les than 25k if I pull at least 5 quick sells at once, and have received as much as 2 250k and numerous smaller rewards in a 24 hr period. So here are the rewards I have received of at least 25k out of 368 large quick sells.
2x 1,000,000
3x 500,000
11x 250,000
12x 100,000
31x 50,000
49x 25,000
Just pulled 8 lg qs last night for 1000, 25000, 25000, 25000, 25000, 5000, 50000, and 1000000!!! That's right, photo proof, sry no video. Facebook Xenop Sun