I was checking out ebay the other day and saw some airbag setups for a decent price. I only really want to drop when I park, so is it okay to get just a front-back system? Also does any one know where to get front and rear brackets for our cars? Any install pics would be helpful. Has anyone used these airbag systems from ebay? Im sure they arent high quality, but like I said, I only want to drop when I park, and raise when I drive.