B&W 803D2 for $4,500?


I've got the option to buy a pair of B&W 803d2 speakers in mint condition for $4,500 (from the original owner).  I currently have a pair of 804s speakers and an HTM3s center.  Should I jump at this chance?  I haven't really kept on top of recent pricing but this seems incredibly low.  Would the match with my center be just terrible, though?
win200
Thanks for the suggestions.  I'm leaning towards buying them simply because it's such a good deal and, if I hate the combination with the HTM3s, I could easily resell them for more than I paid for them. The speakers are local and close to my house, so it's an easy pickup. Doesn't seem to be much downside.
+1 for 803D2. I have owned both 803s and 804s, you will appreciate the improved crossover, better low end along with crisp top range due to diamond tweeter.