appears to be a RFI model.
They are fine skis, but at 15 years old, they tend to be more problematic (and expensive to repair) than the carbureted versions.
They are not inherently a bad design, but they are more complex, and I'm not sure how many new parts still exist for them.
in the 10-20 year old ski range, a carb ski may prove more reliable and economical. the price is about right on it.
However, any 'running' ski you are paying 'running' price for... TEST DRIVE IT. No excuses. Even if seller asks reasonable $ down or to see a boater's license. (required in PA).
if you absolutely can't water test it, a compression test is a good test you can do for a $30 tool.
is this your first ski? second? the GTX is a GREAT hull, you can seat 1,2, or 3, and ski behind them.
the GTX with a carb 787/800 (same engine) is a terrific combo. (I'm partial to the more HP of the 951, but the 951 gets a bad rap for 'only' going 200 hours between rebuilds) (even though that's a good 10 years of use).
I'm not sure the years involved as I'm more familiar w/the 951, but I'm sure people here can point you to the best years of the GTX.
Of course, the newly introduced Spark or even a used modern ski for $5-7k gets you a lot of ski vs. 15 years old.
I'll admit it, I'm even tired of buying oil for my skis...
