I just bought a FC 30 RT with shipping it came to $62.00. Put it on a Superstar 3900. It works. One thing to note is. When you change the channel it displays a random frenquency before it shows the right frenquency. Thats how they are set up. I read about this in my reserch before I bought it. There is a mod to correct this the NET to correct it. It looks good on the 3900.These counters are getting hard to find here in the U.K. What are the prices of them over in the US.