Greetings, Today I ordered my K3 and have three filters excess to my needs: 2 - 2.7 KHZ 5 pole filters.......$45 each $85 for both PayPal add $2 for 1 filter, $4 for 2 1 - 500HZ 5 pole filter......$60 PayPal add $3. Prices include shipping to lower 48. MO or bank check work. 73, Bob K3UL