The U.S. Supreme Court ruled that once someone puts something out on the curveside, it's fair game for anyone that wants it....
However: It doesn't count if it is on private property (eg=example given) (I got chased away from a great dumpster-diving spot, because it was on private property,, and they threw away some really good stuff; it was like a thrift store dumpster).. I'll bet if the community knew they ran me off from there, some people would stop donating to them...
Also: some cities have laws that won't allow you to get stuff from the roadside, because they have a truck that goes by and picks the stuff up, and they seperate it and sell it (recycle it).. But thats very rare... Usually they only want metal stuff...
I'd say, go get that couch,, and if the Po-Po comes up while you're there getting it,, just look him square in the eye, and say "Oh, I'm sorry officer,,, am I not allowed to put this couch here for the trash man??,, I'll just take it back inside with me;;; sorry sir..." lmao : ^ )
I hope you hit the lottery, and can get you all the couches you want.. I am totally in the same boat... : ^ ) ain't no shame,,,, but be careful,, cause there might be roach-bugs in that couch...
Best Of Luck To You... : ^ )
Dale