I've bought out remains of other collectors PC's of my main guy before. It's started with them listing rare cards that I needed. Once I saw a bunch listed it grabbed my attention and I reached out.
Found some stuff they where willing to move at the time that I needed and we worked out some deals.
On a side note, when Henrique was recently traded a couple of collectors reached out with some rare pieces they held onto that I again picked up.
My first time wading into the sea of Raffle Redemptions; beware of SHARKS!