96 xp problems

So there is a man on Craigslist who is selling a 96 xp 800 with a "burnt down cylinder" and he said it would be a fast fix. He is selling for 600. Would it be a hard or stupid risk? I'm very new to problems of this caliber so please, work with me. If anyone could explain it to me in depth for...

ok so i just purchased a 96 XP to go along with my 96 GSX they both have the same 787 engine in them. well i just bought the XP last weekend and well it ran good for about a week and is now having some sort of problem and when i give it full throttle to get out of the water it sometimes bogs...