All Z87/97 motherboards by now are used, you won't find brand new boards of that age unless it's a retro built no-name brand from China. So consider All motherboards you'd likely find to be used. The biggest question being just How used. Did it belong to some teenage hot-rod who ran uber high OC and the VRM's are halfway burned out. Was it a low end model and now drivers are impossible to find. Will it die day after tomorrow and be a waste of money, since it was used and working when you received it.
Used at that age is a gamble, and you are playing Russian Roulette with a 6 shot pistol loaded with 5 bullets.
Sell as much as you can get for it, keep the gpu maybe, get a pre-built from Walmart or similar and you'll be far better off...