That's a great collection you got there
@hubel33 .
Welcome to HDN, feel free to tag or PM me or any other mod you see online, should you need help around or if you want to chat.
As for Group Buys, it's quite simple:
When there's a title you're interested in, make sure you "watch thread" and select how to receive the notifications. When a group buy is announced for that particular title, a link will be posted in that same thread which you can then click on and complete the purchase.
You can also subscribe to watch the group buy sections:
https://www.hidefninja.com/community/forums/steelbook-group-buys.91/ and
https://www.hidefninja.com/community/forums/general-group-buys.128/ so that when a new group buy is submitted, you get an alert etc...
Completing a purchase is quite simple too, you just click on the big blue "buy" button which would be displaying also the cost involved, clicking on that button takes you to your paypal account where you confirm your details and that's it.
Always make sure you read the terms and conditions of the group buys, most are standard but some may not include shipping fees which are then billed later by the group buy host.
Enjoy your time on here!