If you plan on buying collections, you cant realistically throw out rules such as 50% of TCG mid, because then you get screwed one way or the other when the spreads vary wildly on different cards
Within days of release, scalpers began slashing prices simply because they hadn't sold their stock straight away
Then, there are various bundles that players can buy
With Viridian Shaman type creatures you have to hold them back based on the game state to get any real value from them and with cards like Qasali Pridemage which can be more proactive you have to lose the dork in order to use it as removal
$0.99 Baron Von Count Unstable $0.49 Serpentine Unstable $0.35 Half-Shark, Half- Unstable $4.49 Very Cryptic Command (F 'Scry 3') Unstable $0.49 By Gnome Means Unstable $0.99 Do-It-Yourself Seraph Unstable $0.49 Steamflogger Boss Unstable $0.49 Grusilda, Monster Masher Unstable $4.99 Everythingamajig (A - 'Move a Counter') Unstable $2.29 Urza, Academy Headmaster Unstable $0.99 Infinity Elemental Unsanctioned $0.99 Phoebe, Head of S.N.E.A.K