I have a question to decide to buy (Line Output Converter) or (Head Unit)?

I have Pontiac Grand Prix Gt 05 and yesterday I was going to install amplifire, when I removed my headunit, it wasn't any RCA for amp, so I have two choices but I need help


Should I buy headunit:


http://www.thedeepdiscount.com/p-2310-pl鈥?/a>


Or


This Converter:


http://www.crutchfield.com/p_142SLC4/Sco鈥?/a>





I found that headunit in ebay around $30 or less|||if you have the clip for it, you could use the high input from the speakers to the amp, i did this in my 99 sl2 and worked fine|||I think you should buy a new head unit. But stay away from Ebay. For $30 you're likely to end up with a bad unit and if you ask for a refund, the seller will give you a bad rating and call you a scammer.