An easy rule-of-thumb is the more effort you expend the higher the price you will get.
Ebay, especially if you can tolerate the fraud attempts you will surely encounter, will command the highest price. If you are in the USA, opening your sale to overseas bidders dramatically increases the sale price of electronics as well as fraudulent bidders. Many buyers will "appreciate" it if you mark the customs declaration as "gift". There is no risk in that if you are not a routine shipper.
One can normally sell for less than ebay, but more than to Adorama (or another dealer) by selling on Craigslist. Knowing the market, picking a fair price, and being patient is key here.
Selling to a dealer (Adorama, KEH, etc) commands the lowest price, and the lowest risk.
Fraud can be entirely avoided if one is cognizant of the risk vectors and protects themselves accordingly. Be that an effort which is worth the reward (more money) is really a personal decision.