Standard version upgrade originally $99.00, currently $24.50, for "ANY registered customer".
 
Awesome deal considering original new list price is $149 and current list is $105.
 
Even more awesome if all one has to do is buy Music Creator or Pyro @$19 to qualify.
 
Last month I got a flyer in the mail selling X3 Producer Upgrades @$75.00 for X2 Producer customers. Sale expired July 31, 2014 but it was still in effect well into August.

So I could go from SONAR Producer v4 all the way to X3 for less than $25?    Nice!
 
If only it came with a new DAW powerful enough to run it!!! 

Well, I went to the upgrade page (see link below) and the cost for me is still listed as $199.  Where did you see this $24.50 price? 
 
http://www.store.cakewalk.com/b2cus/ProductInfo.aspx?productid=10-CXSP3.00-30E
 
 

That's for Producer. I was plugging the add for the entry level "standard" version X3 found here:
 
http://www.store.cakewalk.com/b2cus/ProductInfo.aspx?productid=10-CXSR3.00-30E

Oh, well that's unprofessional!  (It says so right there in the ad.)

I use SONAR X3 Unfunny.

bapu
I use SONAR X3 Unfunny.

Yeah, but aren't you the guy that says there's no bugs in any CW product?