So far my experience with groups is:
- MYSBuyingGroup: Most "deals" are below cost. No ACH
- BFMR: Pays fastest, but has limited deal flow. You dont haver to request payouts they just ACH the money over as soon as something is delivered. They had some delivery issues with a few of their locations, but they've long solved them and provided new addresses.
- EDB: Rarely have issues, but when you do support is non-existent. Pays and scans super fast, but you have to request a check. No ACH.
- TBD: Best custom service experience and a very active discord community. Offers ACH, but it takes a week (longer during holidays) to get paid out.
- USABuyingGroup: Literally the worst option. The have a lot of deals which makes them compelling, but they lose about 5% of my orders which quickly kills any benefits from the volume. Support takes months to respond and generally says "sorry, nothing we can do". Avoid them like the plague.

With retailers:
- Amazon will almost always deliver as long as you aren't using gift cards.
- Walmart will quickly block an item for address based on qtys ordered to that address, not by account. Worse if they choose to deliver from store you'll have no tracking number and the goobers they hire from uber to do deliveries are just as likely to leave your package in the dumpster as they are to actually give it to the loading dock. If they arrive after hours they must just leave it on the curb and you have to hope nobody steals it.
- Target works most of the time, but occasionally blocks buying group addresses.
- ebay works every time, but returns are hassle if your buying group decides not to accept the item for some reason.