Guys, I need to get some feedback about buying a Glute Ham Developer. I ran across a REALLY good deal on craigslist! A guy is selling one made by York Barbell that is in excellent condition for only $300. http://www.muscledriverusa.com/York-...HD_p_1128.html I've heard only great things about the machine, but I'm wondering is it really essential? I'm trying to make room for it in my home gym now.