The safest/easiest option is usually to sell to someone you know, if that’s possible. After that, a reputable used camera dealer or local camera shop is the simplest low-risk route: you bring in the gear, they evaluate it, and you get paid. The trade-off is a lower payout than a private sale.

If you want a larger market and potentially more money, eBay can work well, but use care. Don’t ship until payment is fully received, and use insured, trackable delivery with signature confirmation. That helps protect you if a buyer claims the item never arrived. In any marketplace, stay alert for scams and deal with buyers who seem genuine and knowledgeable.

A well-known used-gear buyer like KEH is also a solid option if safety and convenience matter more than getting the highest possible price.

In short: highest safety/convenience usually means lower return; highest return usually requires more effort and more risk management.