Hi-Value Mines

 is a Support Monkey Knowledge point in Bloons TD 6. It allows the Spiked Mines upgrade to cost $1,500 less regardless of game modes. It requires eight support knowledge points invested, Very Shreddy, and a one-time purchase of 500.

Prices
The following are prices for the Spiked Mines upgrade with and without the effect of Hi-Value Mines:

Tips

 * It makes it easier to afford Spiked Mines alongside extra defense on Deflation Mode.

Trivia

 * Hi-Value Mines provides the greatest flat price decrease out of all MK available in the game.