unless you are rich and don't care i would never buy new equipment online. the best option is hunting for deals on craigslist or places like that.. people are always trying to dump their shit. you can get there and pretend you don't like the stuff and low ball them
Most home gym equipment is very low quality compared to gym grade. It really doesn't save you that much money when you think about it. Most gym memberships are 30-40 bucks a month.
Me personally, I would spend my money a gym membership