Green_Hilltop: Is there any difference between 'reserving', aka buying the Groupee bundle ahead of time vs just buying it when it comes out?
You are getting the full bundle for a cheaper price.
It's a gamble - you pay less, but you don't know what you'll get exactly (though there are often hints).
I usually pre-order Groupees bundles, and I'm happy with the results. Though I'm seeing this through the eyes of a collector, which means that paying less is always a win for me as long as the bundle isn't full of repeats. And Groupees usually takes care to not stuff bundles with repeats.