New member!! Need some Vet advice
 

So, I've been searching left and right, up and down for a Speed6 that is in my price range and that won't be a ticking time bomb. I found a couple that were perfect but then they were sold one day before i could purchase either (total bummer). Anyway I found one but it seems to be a bittt over-priced, it is very well taken care of but I think the seller needs to come down considerably. Also the seller says the car has a vacuum leak, I'd like to know from someone with experience if this would cause any problems in the long run (theres a description of the problem in the link.) I've been lurking on the forum and I know what to look out for when test driving this beast but any tips would help.
Mazda : Mazda6 Mazdaspeed Sedan 4-Door in Mazda | eBay Motors

If someone of you could take a look at the car and tell me what you think a fair price to end up at is I'd really appreciate it. I'm thinking around $12500-$13000. Also anything about the vacuum leak would be greatly appreciated. It's a stage2+ tuned from an AP, if that helps. CANT WAIT to get my own Speed6 and become a real member of the forum. Thanks ahead of time guys.

-Gil