Pretty much what the above statement said.
And firstly congratulations on the zxr250. Fun little bike, and im sure you will enjoy it. Also welcome to team kawasaki, its the best team

Long story short, basically there is no such machine as the "zx2r". Kawasaki never made or marketed a bike under this name. However, there were zxr750's which later became the zx7r. There is also (as im sure you are aware) a zx6r, zx9r, zx10r, zx12r and ax14. As such the zxr250 became colloquially (man im sure i spelled that wrong) known as the zx-2r, much the same as the 250 yamaha was getting branded the "r2" for awhile.
Just as a personal thing i dislike any bikes i see the "zx2r" sticker on. Not because there is anything wrong with this terminology, but because of what the sticker usually signifies. Original paint scheme bikes would only ever have had "zxr250" printed on them. The majority of bikes with "zx2r" on them are bikes that have been imported into Australia, repainted and sold to many consumers who believe they own a much newer bike than they actually do. My understanding is that the zxr250 had two model runs. One from 88 - 90 which was the "A" model with the twin headlights. Then one from 91 - 93 as the "C" model with a single headlight and slightly different engine and suspension. There was also an Australian delivered model which was a re-manufacture of the "C" model in 2003. Same bike as 1993.. consider it a 10th anniversary edition.
Why is this relevant? If i had a dollar for every time i saw someone selling a "1998 zx2r" i could buy all the bikes i wanted by now. Chances are the bike is actually a 91-92 zxr250 which was complianced in Australia in 1998. Build date is different from compliance date..... However certain unnamed sellers sell the bike as "latest 2005* model". It isnt until you read the fine print that you see "*latest 2005 paint scheme". Ok so im burnt. I saw a friend buy a "1998" zxr250 for $7k. It is actually a 91 model. And once the shine of the paint started wearing away (and that was quick as it was a really dodgy paint quality) we started to notice old weld marks on the fairings, some of which were aftermarket and melted due to heat, and a different paint colour underneath. It is not unheard of for companies to import thrashed bikes from overseas, freshen them up and sell them for top dollar here.... this is the practice i have issues with. And the worst thing is, at least his stuff was only cosmetic. A lot of people out there have had similar but worse experiences.
Realistically once you get past the 250 stage you will notice any bike that has a different than factory paint scheme will decrease in value - significantly. The reason is because the first thing people will think is that the bike has been dropped - even if it hasnt. Sure the $2k on a nice paint job may seem like a good idea at the time, but its a pretty much guarentee that when you go to sell your bike it will reduce its value by roughly the same amount.
This is slightly different in the 250 market as a lot of it is more about appearance. However personally one of the great things about seeing a bike in it's original state is that you can get a feel about how it's been treated. With a new coat of paint, and a bike that has been cleaned to the nines you cant really tell as easily. Consider that the zxr250's rev to 19.5k and you can destroy an engine in 20-30,000km's if you dont take care of things.
Ok so i've got off topic. I really do hope your zxr250 turns out a lot better than some of the ones i've seen. I just wanted to fill you in a little so there isnt any more confusion on this topic. The zxr250 is a fun, and fast bike. They hate to start on cold mornings as a general rule, but once you get the hang of them they wont give you too many problems. Ride it, enjoy it and make the most of it.