My neighbor is going to sell me his used 7336. Is there any difference between that one and the 7336sp. He says it doesn't have a dust collector but that should not matter for polishing cars would it? He currently uses it for sanding so all I would need is the velcro backing plate and the kit from cma? He wants $70.
As long as it's in good condition and seems to work fine (don't run it up to 6 without having the pad on something 
) $70 cash sounds like a deal to me.