as others have mentioned good current photos of the gear helps (make sure everything has been cleaned), take the caps off of the lenses and give the buyer a good idea what sort of shape the glass is in. An honest description of the condition of the gear goes a long way. see what the going rate is on ebay and amazon for the used parts and then decide where you want to post it. If you want it to sell fast just take the average price and discount it 5-10%. Also check who else is selling the same stuff where ever you post it and consider undercutting their price by a few points. Craigslist is good, I always leave my phone number for folks to call me and tell them text messages and emails will be ignored. Your more likely to get a serious buyer if they contact you via phone. Of course the usual CL cautions, no shipping, cash only, meet at a public location (local starbucks etc). Other places are fredmiranda.com (there is a one time buy and sell fee), photography on the net (no fee, but must be a 30 day member and have a certain number of posts), and of course ebay.