Buying an 06 rx8

Hello everyone, new member here, I've gotta say this forum has lots of useful information. I'm about to purchase a 2006 rx8 GT, it's got a clean body, and interior, 130,000 Km (80,000 miles). They're asking $3,900 Canadian, but talked him down to $2,500. As far as I can tell the car needs ignition coil bracket, alternator makes a bit of noise for the first few minutes when cold, and has a weak battery. Now my main question is based on what I read here is, the car has hard start when cold or hot, have to crank it up for about 5-6 seconds before it starts, does that necessarily mean bad compression or could it be related to something else? I'm planning on getting a compression test regardless... but it does drive fine. Do you guys think it's worth the money?
Here's a link to the car:
http://ift.tt/2hD4Lkl

Buying an 06 rx8