In which case you purchased a game in Beta State and got it cheaper than the release at gold. Just shelve the game and pull it out when it goes gold. Problem solved.
Prototype = Pre-release Basic game, place holder graphics, only partially playable. Potentially many bugs or issues.
Alpha = Pre-release Basic game, more game graphics in, a lot of the functionality of the game is in. Potentially many bugs or issues.
Beta = Pre-release Basic game, most major features are in, working out bugs and issues. (This is where the game is currently)
- Beta's by definition will have bugs and issues with it as it tests playability. (Feedback is assumed.)
- Looks for user feedback to help get the game ready for full release. (Feedback is looked for.)
Full Release (Gold) = Actual game, no longer testing. Game should be ready for everyone to play with very little or no issues.
- This is anticipated for release in Spring of 2015 based on the most recent update of the schedule, however, is possible to change.
- Full release appears to be what you're expecting so as Larsenex stated, maybe if you weren't looking to beta test hold off for a few months.