I had a nearly complete (just missing a few TPM items) boxed Hasbro 12" collection that I sold off individually. I probably got $0.75 on the dollar for what I paid for it.
A handful of items are selling at a decent premium. Half sold for about retail, and about 1/3 sold for steeper discounts of $9 for a $20 figure.
As I mentioned previously, probably 1/2 of my collection sold to international bidders with nearly all of the big ticket items going internationally.
I did sell my stuff in the November/December time frame so I might have gotten a little boost from Christmas shopping.
It was amazing how much room I created by clearing out my 12" collection. All those boxed items took up a ton of space. Probably eight very large moving boxes worth of stuff.
It was a lot of work though. Finding all the items in my collection, taking photos, finding comparative pricing on eBay, listing them on eBay, re-listing them on eBay, shipping, and dealing with all the auctions was a lot of work, but I ended up getting $2000.