It's simply a matter of conducting your own research, Ken.
Look on eBay for both domestic and international sales of the same items. Search our Marketplace for previous listings (and look on other forums too). Compare prices from on-line retailers of used equipment.
We're all in the same boat when selling stuff. No-one here can tell you what the right prices should be. Just do a little research, set your prices, and be prepared to accept offers of slightly less (or not, as the case may be). If the item doesn't sell, you can choose to bring the prices down a bit, or hang on to the equipment.