Today I will be highlighting a few Dredge cards that are all seeing renewed interest in the Modern Format.
Dredge allows you to get a card from your graveyard back into your hand, at the cost of milling cards from your deck into your graveyard. This combines extremely well with the re-emergence of the Delve mechanic in the Khans of Tarkir Block, and likely will synergize with many cards not yet printed. Further, it has a nice synergy with the Delirium mechanic from Shadows over Innistrad.
I will keep commentary mostly quantitative for this post:
Dakmor Salvage was reprinted in Modern Masters (first printed in Future Sight). Non-foils are jumping from $0.50 to $2.50 within the next few weeks. Foils are jumping from $4 to $12 within the next few weeks.
Raven's Crime is a classic combo card with Dakmor Salvage, also first reprinted in Modern Masters (originally Eventide). Non-foils are headed to $2 apiece and foils are headed to $8 apiece shortly. Reprints will DESTROY the non-foil price, so unload non-foils before Conpsiracy and/or Eldritch Moon hit the scene.
Become immense is seeing play in Modern Infect. This is longer-term spec, with Foils looking at $15 apiece in a couple years. Non-foils are likely to to hit $1.50+ within the next 9 months. Reprint likelihood is low.
Necroplasm is my kind of spec. The Foils spiked to $10 a couple months back, confirming their competitive viability (to my mind), but the non-Foils are just starting to see movement. Getting dozens of these at $0.35 apiece will be a great investment in several months. Foils already spiked recently, they're settled down to around $5 apiece. Steer clear of these unless you see some Foil price movement (it's inevitable - 2 years from now we'll be back at $12 foils, no problem), and even then don't buy in above $5.
Stinkweed Imp dredges well above its weight class. The Foils are headed from $5 to $12 apiece, non-foils are going to max out at about $0.50 apiece. Grab underpriced foils, don't bother with non-Foils. Also, grab Ravnica copies (different art than Modern Masters, screaming for a Foil finish).