I would go with a AVALON group buy with escrow option, if I were you.
That way you are covered in case AVALON doesn't deliver.
No you arent covered from avalon's non-delivery.
The escrow group buys typically covers you from.
1. Group operator not placing order with avalon and running away with the funds.
2. Group operator not shipping you the stuff once avalon sends it. For this, the only collateral placed in escrow is the operators identity.. Then you must find your own ways to get your coin back.
Escrow only collects the coins for the buy, and sends it to avalon...