I collect full sets. I have from the very beginning. Well, My Beginning which was Unlimited up to
Prophecy. I Stopped collecting and only bought cards I really liked until Innistrad. Since then I've been collecting full sets again. I only play with cards I don't really care about with single sleeves. I usually trade in anything I cant see myself playing as soon as I open it from a booster. I do however have a
Kaalia of the Vast EDH deck that is valued at around $5000. it contains mostly foils and 12 Expedition lands as well as 3 Beta Dual Lands (The list is on my page). It also has Foil Kaalia Sleeves and a Kaalia Printed Commander sized deck box. I have it Triple Sleeved but I found that it is hard to play with that way because air will get into it after each game and it needs flattened out, Which causes it to stick together.. it's actually a huge pain! But it's worth it.