Sure they (and the Knicks) would like Ray, lots of teams would, but the price is a pretty important factor these days.
If Ray will take Eddie House money, sure. That's either a minimum deal or a fraction of the MLE, not $5M per for multiple years. And I think 2 years is being generous.
Let's keep in mind what it takes to get Ray those high % and points totals: a total team committment to get him open (triple staggered screens, Rondo passing - that's the whole team working to get Ray a 20+ft jumper). It's not like he's getting those 20pts on his own. The stats are a bit of a mirage.
1. Eddie House money? What an insult to Ray. 2 years at $5 mil aint bad but it could be lower. If reggie played as long as he did, ray can still have some years.
2. A mirage? Then whose stats (a select few aside) are not a mirage? Who else is as lethal from deep AND can make crazy off balance shots that somehow go in? the fact that so many of those impossible shots go in and he has a incredibly high fg% shows just how much skill he has as a shooter.
He cant create his own shot like PP, if you wanna knock him for that, but even if you gave the best shooters a team like the C's to help on screens and set ups, they will not shoot as well as him.
All of this reaffirms the point: Ray Allen, while a good defender and player generally, is mostly a one-trick pony, and the entire team works like heck to get him an opportunity to show off his trick. He's better at it than anyone else, and surely is valuable, but he can pretty much only kill you with jumpers these days.
And Eddie House initially came here for about half the MLE (split with Posey, if memory serves). Ray's getting to that point, and it's in line with what others here are suggesting.
The thing is, and this is the main point: a complementary player's value depends on the construction of the team. Ray can put a team over the top, but can't get a team anywhere near the top. He won't be the top priority this offseason, or even close. I'd put more energy into resigning Bass than Ray at this point (and pay him more, too), though neither would be my first call of free agency.