Kyle- pricing on Toyotas is really difficult...you get asking prices all over the spectrum. What it ultimately comes down to is how badly the seller wants to get rid of it.
Just a few months ago I bought my 2001 x22 with 185 hours for about $25k. It's in really good condition and came with LOTS of goodies, and this price, to me, was a good deal.
If they are asking 24,700, they are expecting to get $24k for the boat. I would say that if the boat is in really good condition, that is a fair (maybe slightly-high) price.
Something to consider: we're coming into prime boat-buying season, and it's harder to convince sellers that you should be getting a better deal. You should do whatever you're comfortable with -- If you can't live without this particular boat, need a boat now, and worry about another one coming around in the near future... and are able to pay $24k, you should go ahead and do it -- you'll be happy regardless.
Good luck!