I would like to sale my Sony Vegas pro 11 that I just purchase.
I am not sure where to post about it.
As well, how much would you think I will need to discount it.

suppose it sort of depends how much you paid in the first place - upgrade / full?

either way i'd expect to see a receipt for it.

I paid $599.95.
It was a download from Sony Creative Software - Vegas video - ACID & Sound Forge audio editing (http://www.sonycreativesoftware.com)

Dror, contact Sony Customer Service and ask for a refund.
There have been a few posters on the Sony Vegas forum who have asked and gotten it because they weren't happy with Pro 11.

US, Canada, and the US Virgin Islands:
English language service
800.577.6642 (toll free)
9:00 a.m. to 5:00 p.m. CST, Monday through Friday

Actually, you'd like to "sell" your copy - although it would probably have to be for a "sale price" which means, as Mike said, you're better off asking Sony for a refund.