honestly dude how long are u looking at before u get some actual coilovers? if ur gonna buy some in a month or two just save up all ur money and dont waste any, seriously u can buy some pretty nice ones for around $500-600 even cheaper if u get em slightly used, and plus those things on ebay wont lower your car enough to even make a noticeable difference.....
i know ur impatiant, but honestly the best idea is just to wait for the money for something worth the money, instead of wasting it on something that could theoretically ruin your car