(This says in reply to HaeckDesign, but applies to the thread in general rather than that post specifically)
There seem to be two issues in this thread:
The original issue that the thread was started about:
Those of us who bought it on Mavericks and still want to use it on Mavericks but can't because it's been removed from our purchased list.
And the second issue which this thread seems to be diverting onto:
Paid for it on Mavericks, updated to Yosemite and don't want to pay to get 4.x, which has nothing to do with issue that this thread is about, but seems to be happening in multiple other threads as well, which only serves to confuse matters.
Yes, it's a pain that Apple charge for new major version numbers on Server, but Server has always been a paid upgrade, and probably will be for the foreseeable future, we've known Yosemite was coming for months now, so nobody should be surprised - it's not like they just jumped out on stage on Thursday and yelled "Surprise, new OS!", if you want to run Yosemite on your server you have to be prepared to pay for the license - just be thankful that it's no longer a $1000 license as in the old days. If you feel you've been short changed, reach out to Apple directly or apply for refunds etc, but please don't divert threads away from other issues because of it - the original poster and others of us in this thread are trying to get back our access to our 3.x.x downloads so that we can use them on the OS they were intended for.