[atom0s]

Don't think a group-based purchase has ever happened. Just something that is suggested every few months.

Like @Chuck954 said though, the IDA team has been extremely anal lately with licensing to personal developers or small teams. Best bet would be to try and use a reseller but the amount of those that are still around is fairly low too. (Along with those with fair pricing and are actually legit.) You can see some of the lead devs previous Tweets over the last ~2 years and see how he's been towards others. Especially since Ghidra was announced and then released.