Few - barring the likes of, say, multi-format all-star Deathrite Shaman - end up making appearances in the main deck, usually being relegated more to the sideboard
With recent non- Masterpiece sets, the average rare value has been somewhere between $1.25 and $1.50
I cant imagine a sacrifice or self-mill deck that doesnt want this excellent Golgari card
Always build your strategy with these centerpieces in mind because your deck needs enough support to keep them online
At any rate, Spider-Sense looks poised for competitive play, though its more reliant on creatures than you typically want your cheap counterspells to be
They don't copy whether that creature was tapped or untapped, whether it had any counters on it, whether it had any Auras and/or Equipment attached to it, or any non-copy effects that changed its power, toughness, types, color, and so on