Why does Exchange Sup****t cost ~$250

Version: 2008
Operating System: Mac OS X 10.5 (Leopard)
Processor: intel
Email Client: Exchange

I purchased Student and Home not thinking I would need exchange sup****t.
But now realize the short coming in Entourage and require the Exchange
sup****t.

I asked Microsoft if I could purchase an update version of Standard and
was told no. I would have to send my current version in for refund. Wait
approx. 25 days for my refund and purchase a full version.

In my book, that is paying $250 just for exchange sup****t in the package.

I wish I could find the receipts for the 3 Office Pros I have for the PC
and refund those to cover the cost.

Or better yet, allow me to download the media and use the current PC key.

Can anyone tell my why Exchange is soooo expensive? It used to be free
with Exchange Server.