Chucking a land into the graveyard is easily exploitable by cards like Wrenn and Six or Crucible of Worlds, which lands-based decks are already interested in playing
If you still have yours and want to sell it, youve missed the boat
Four ink for a decent character and a six-cost song is a tonne of value
Market value is $25, and seems fairly stable right now as well, albeit the foil version fetches 10x that, with listings up to $250 at TCGPlayer right now
When Novice Inspector enters the battlefield, you get to investigate, letting you create a Clue token while also getting a 1/2 body early in the game to do whatever you want with
The one downside the card has is its fairly inefficient stat-line, but honestly, given how strong this is, that hardly matters Cursing an opposing creature isnt the most powerful thing in the world, but when you Bargain this does upgrade your board and downgrade your opponents reasonably effectively