Upload & Sell: On
eBay has a MUCH larger market for sales of camera gear. I don't like the fees for eBay and Paypal very much, but for rapid sales, that offsets the better percentages here on FM. That said, I usually offer my gear here first if I'm not in a hurry.
Unfortunately, there has been a huge dumping of used gear to finance all the new offerings around. So prices, especially here on FM, have been driven way down. (As a buyer, I love this!) Even stuff that I bought used at great prices, such as Leica R and Contax Zeiss, have trouble recouping those prices on resale. I'm not used to that! I'm used to breaking even or making a couple bucks for my time. I've got some items here on FM that haven't sold in 4 weeks, like 1Ds2 and other decent gear. I'll need to break up my RB67 Pro SD collection (who wants film, anyway? ) and place on eBay (I thought I'd avoid the tedious listing and shipping!) to get it to finally move.
People will rave about IQ of certain Alt or used gear, but when it comes up for sale, that tiny market is saturated and stuff sits unless you really discount it, or it's really collectible/desirable.
It all depends really. I like FM a lot and always try to find deals here and offer stuff here first. But as they say, business is business. So you have to be flexible.
Good luck, and enjoy the gear you have to the max, so you don't mind pushing it out the door when the time comes!