Not unless they are just giving him away, in which case of course we should. You should always buy low on players who are legitimate assets, but for whatever reason are made available by their team.
The problem is that I doubt they are ready to just send him off for scraps and the players they would want back in return (Green/Rondo or some combination of Humprhies/Wallace and young guys and picks) isn't worth it for us.
Asik is a great piece for a contender, but really won't fit in well with a rebuilding squad. If he can be had for pennies on the dollar then we should definitely pursue him (even just as a trade chip at the deadline), but outside of that I don't see the fit for us right now.
Other teams are going to be able to come up with better offers for his services than we would.