You're not going to find one in that price range that's actually running and ready to go ride. You can find a wrecked/sunk one for that much, or one with engine problems for that much, but essentially ~$2500 is the cost of a good used hull with electronics or the cost of a good used 4TEC engine alone, but not all-together and ready to run. Sorry. And the trailer alone for a 2 or 3 seater hull runs a good $600 used by itself.
For the money you have to spend, a mid-90's 2-seater 2-stroke model on a trailer in ready to run condition is all you're likely to find. You're not likely to find a 4-stroker that's in good condition and ready to run at that price point though, I'd be VERY suspicious of anybody looking to sell you a 4-stroker (especially a SeaDoo 4TEC PWC on trailer "lake ready") in that price range, there's something bad wrong with it IMHO and the seller isn't telling you the whole story about it.
My 2006 RXT I paid $2100 for on the trailer, but the engine had a bent connecting rod and was out of the hull and lying in pieces (the owner couldn't afford ~$4500 for the dealership to fix it, and didn't have a clue how to fix it himself). So I bought it for very little figuring I could take a stab at fixing the engine myself and hoping there was nothing else wrong with it, or spend another ~$2500 or so on a good used or freshly rebuilt engine). Lake ready-to-run this machine sells for ~$6500 on trailer all day long so as long as I came in under that amount I figured I'd be ok. I was able to fix the original engine though with just a couple hundred more dollars and several weekends of my time and effort. For a deal like this you have to be willing to buy something that's broken and figure out how to fix it and there is some risk involved you might find there's more wrong than you thought and/or not be able to fix it right... I took a chance, it worked out well in my case. Just saying... this is the only way to get one for that price range that I know of. Beware scams offereing a too-good-to-believe deal on an exceptionally clean SeaDoo with low hours ready-to-run, they're always too good to be true and the internet is filled with those!
Unless you're offering a ridiculously low amount of money for it, always test drive it 1st! Other's have been burned and posted about it on here lately, there's plenty of people looking to get rid of lemon's that they've put together with spit and bailing wire and they don't want you to test drive it at all they just want your cash and "bye-bye now!".
- Michael