Selling a Hafler DH500

I use to run a mobile sound service and the first amp I purchased was a Hafler DH500, it was the wrong choice for that use. Over time I've moved on to Crown 1200 sound reinforcement amps.  While using the Hafler for commercial use it blow out the "slow blow fuse" once and the Sounding Board (place where I bought) told me to just change the fuse.  About a year later it blew a fuse again, but this time since I had amassed several Crowns I ended up just retiring the Hafler DH500.

Now I want to sell it.  Where do I start?

Thanks