Wishlist is pretty tight right now so the only list diving I'd do would be "bling" upgrades of cards I already have.

Janky Budget-EDH/Pauper player. I have all all of my Mythics/Rares/Uncommons/Foils/Full-Arts/Alternate Arts inventoried.

Trades go out in plain envelope, sealed toploader(s) usually. Drop off at post office, weighed to make sure there's proper postage. Can work out bubble mailer/tracking if requested.