That was me who has made nearly $1000 since Dec. The question isn't what have I sold, but what HAVEN'T I sold...
Let's see...My dh sold some old scanners and electronics equipment. Those were big ticket items (over $100 each). We both sold our childhood

(It was time to really start "clean sweeping" and we sold a lot of vintage stuff. Old Avon/Hallmark pins from the 70's (I had 9 of them and sold them for $31!!), Smokey Bear stuff, a vintage Raggedy Ann doll, Girl Scout stuff, etc.) I sold old clothing of mine and my boys, a NWT tags Columbia Boys parka that I bought for my son and he outgrew (bought it on clearance at Kohl's for $21 and sold it for $38!), picture frames, wedding gifts that we never used, some "wanted" toys (sesame street stuff sells well I found!), my son's fireman raincoat that I bought at Marshall's last year for $15 and sold this year for $21 because he outgrew it), a vintage Vera Bradley handbag (Vera Bradley sells very well!) 3 sets of bedding, some Princess House stuff of my grandmothers that I really didn't want! Lots and lots of stuff!!!
I still have a yard sale pile for when it warms up here. I have a Fisher Price Picnic table, Little Tikes basketball hoop set, Little Tykes slide, etc. that I don't want to be bothered selling on eBay. My friend and I are having a joint yard sale so I'll sell those things plus other stuff that didn't seem eBayable (didn't look to be a market for some stuff).
I don't put a lot of time into it. I try to just list on Saturdays or Sundays, and then for shipping, my dh takes everything to the post office on his way to work during the week (he works 2nd shift) He picks up boxes and envelopes at the p.o. for me when he's there shipping. It's sort of a team effort!
I have really found that there is a buyer for everything! I'm looking at listing about 20 Pez dispensers that we have in a bag from the kids....they look to sell like crazy!!
Good luck!
Marcy