Looking for the MRP-M500 class d monoblock..

The one that puts out 500 RMS x 2 ohms.. and 300 RMS x 4 ohms..

Also.. would like to get one of the older v power amps.. four channel.. that puts out 50 x 4. Just let me know what you have and prices.. prefer pictures also..

Would also like new or like new. But of course who doesnt?