I agree with the earlier posters that suggested craigslist. If you are done with the item and it's still in good shape you can resell it on craigslist too. For accessories, I would suggest Target of all places

I know most people think of junk when they think of Target quality, but I've purchased velvet curtains with blackout lining from Target for $40/apiece and no has guessed they are from Target, although I don't mind telling them that. Also picture frames, decorative trays, mirrors, etc, I've seen lots of cute stuff, the trick is buying stuff that doesn't scream "cheap." Also Home Goods for decor stuff as well. Good luck!