From what I've read in other threads, price depends greatly on when you buy what year's model, and where you are buying.
I can tell you that in my area (greater Washington DC area), what few 2009 Versys that are left are selling for like low 5k range (5300 I think was the last one I saw an ad for, but I think there were substantial fees on top of that, probably like $400 or more) plus tax, title, registration.
However, I traveled about 400 miles away (800 miles round trip) to find a 2009 for about 4790 plus tax (3%, or $143.70), title ($10), registration ($51.50), but there were no other fees on top of that; delivery and assembly were included in the dealer's price, and there was nothing since I was registering and paying tax in another state.
Some others on this forum have paid even less... I think the best price I've seen here was like 4300 plus maybe 100 doc fee? But I can't exactly remember...
However, I think the sweet spot right now is around 5k, as this is what the majority of ads I looked at were going for a new 2009 model when I bought about five weeks ago.
Methods I used to arrive at these figures were largely based on craigslist ads placed by dealerships, ebay, cycle trader, and other "classifieds" type sites where dealers sell at. I myself am absolutely horrible at negotiating, but was on a super tight budget due to not being rich, and spent a good month or two really studying published prices.
However, I think the most important thing about price, assuming it's within what you can afford without killing yourself, is weighing the convenience factor.
For example, to get that price, I had to take a day off of work (paid vacation day), rent a trailer for $30, spend $100 on gas, and spend 14 hours on the road on day when it was 98 degrees outside. Some others may say that's too much time and trouble just to save a few hundred dollars on something that costs 5k or more.
Are you the kind of person who mows your own lawn, rakes your own leaves, changes your own oil, and spends 2 hours a week clipping coupons so you can save $10, or do you pay others to do those tasks because you have the money, while time (on your bike, with family, friends, etc.) is worth that cost to you? Especially if you are financing the bike... the difference in the monthly payment is almost nothing; 6% loan for 24 months is only $22.16 per month for every $500 you borrow. Although, if $22 is a lot of money for you (as it is to me), well... hehe.
Me? No kids and money is very tight (no financing, paid the whole thing in cash), so I had to put the time in and go for the best deal... but each person makes that decision for themselves.
And a lot of people are paying 6500 or more for the 2010 model and are very happy with what they got, and think the bike is worth that money.
Personally, I'm pretty new here myself, but I have seen people talk about prices in other threads... usually it seems to be just fine, although commenting on what someone should or shouldn't pay, or what someone should or shouldn't sell for is perhaps risking going over that line of "just fine".
It does seem like, due perhaps to the economy's huge downturn recently, that there is a temporary and substantial price drop on the 2009 models because there were a lot left over, but some have speculated that once all the 2009 models sell out, pricing will return to "normal", though I couldn't say for sure what "normal" is nor could I say when the 2009 models will run out.
I'm a n00b in the ways of motorcycle buying and selling, and this is the first bike I've had in almost 20 years, so keep that in mind as you read this.
Best of luck to you.