Sorry to disagree, but MTG cheap?? I don't know your prices though, but everywhere else it's not cheap at all
Kid: ¡Yay! I want to start Magic! I think I'll make a White deck...
Shop guy: Ummm, okaaaay... uhh, so it's four Baneslayer angels, three Ajanis and four Honor of the Pure... uuummm, I'd also take a full playset of fetchlands, you know, to mana accel... it's, um, $400...
Kid: Well... what about an older format? Extended?
Shop guy: Okaaayy... four Figure of Destiny, four Chameleon Colossus, four Thoughtseize, duals, four Tarmogoyf...