Big Deal Achievement
On day 2 of the Framing Frame job, trade 9 paintings.
You will first have to steal 9 paintings in Day 1 of the Framing Frame job. The amount of paintings that spawn on this job is random each time the level loads. It can be anything between 6 and 9, though 7-8 is most common. If you do not have enough paintings, just restart the level. In Crime.net Offline all you have to do is hit and select "restart game" to restart that day. If playing online, so long as you are still undetected, you can go up to the roof, and jump down through the glass. As long as you don't land on anything before you hit the ground, you should get downed, and the AI won't do anything about it. The Paintings that can be stolen will have a red sticker on them. This is easiest to do stealthily. See "Painting Yourself into a Corner" for tips on how to sneak through Day 1.
Day 2 is simple. At the start of the day, you’ll have to carry all 9 paintings to a table in the abandoned train in front of you. Once all paintings are there, a helicopter pickup will arrive above the train; you’ll have to pick up and throw the paintings up through the hole onto roof of the train where the helicopter will take them and drop a money bag for each painting. This is the trade. The achievement will unlock as soon as you trade your 9th painting.