Quoting dee1959jay:

Quote:
At the time of release, the website of the "publisher" will sometimes give you the "real" SRP. I'll take those data over any webshop.

And like you said: I don't see a problem in an estimation as long as it is based on something (a similar release in the time of first release, parallel release across Europe in the case of the same distributor, forum posts about the prices) either. It's the part between brackets that makes the difference to me - it's called documentation.

Then we're on the same side of the fence