Here's the thing, on a 1995 Kawi ZX-6 the average retail is 1,580 - $2,059. This was as far back as NADA goes. Now, if you combine what seems to be too much of an asking price, plus upgrades that may or may not have been professional installed, plus high mileage, plus laid down...twice, I would think twice. If you still like the feel of the bike, than offer $1500 and see what the reaction is.
Second, is this your first bike? If so, I would just go with an EX500 or the 250 ninja. Both used bikes can be had for the same that this guy is offering, but with far lower miles on it and a lot better condition. Both of these bike are worth keeping if you move up to a bigger bike at a later date. You can get a new 250 ninja for about 500 buck more than what this guy is asking and it comes with a warranty. I know that we generally say stay away from new for a first bike, but I would rather go new in this case than the used example you are giving.
Second, is this your first bike? If so, I would just go with an EX500 or the 250 ninja. Both used bikes can be had for the same that this guy is offering, but with far lower miles on it and a lot better condition. Both of these bike are worth keeping if you move up to a bigger bike at a later date. You can get a new 250 ninja for about 500 buck more than what this guy is asking and it comes with a warranty. I know that we generally say stay away from new for a first bike, but I would rather go new in this case than the used example you are giving.