Here are 10 archetypes that cost in the hundreds and have top 8'ed a tournament(s) of at least 6 rounds in the last 6 months. I'm not including budget versions of archetypes with shock lands or something; only optimal deck lists.

They span from $159-$971, using TCGPlayer prices. I've used the biggest finish if there have been multiple placings. For simplicity's sake, I'm only including the main deck, unless the sideboard needs comment. Some can be made even cheaper with fetch land switches that have no impact.

Manaless Dredge: $159 (Force of Will in sideboard, but with recent printings, it isn't necessary or maybe even optimal. Would still cost three figures anyway)
Burn: $175
Mono Reanimator: $461
Mono Storm: $529
Depths Reanimator: $663
Pox: $682 (Pretty sure the sideboard is just a flex)
Goblins: $793
Infect Shoal: $888 (If you replace Misty Rainforest with Flooded Strand, which is the same in the deck)
Mono Delver: $929
Death & Taxes: $971

Quite a few archetypes with tournament finishes just missed the cut, like Merfolk, Slivers, Mono Nivmagus, Soldier Stompy, Mono Pteramander, and Spiral Tide