I have been in on one of these orders before. I had the same feelings as well right after the picking and bagging. But after the rocks had a chance to settle in to my tanks. Acclimated to lighting and start growing again. They have really started to become my favorite pieces.
Ya some stores probably do the same order. You can probably find the same stuff and sometimes cheaper. But you can imagine if that store found a couple diamond caliber pieces. You would not be paying $35-$42.
I think this is fun to do with a good group of trusted friends. Yes, you win some, you lose some. But I think it makes it fun too. The excitement, the let down, the Ha! We will see if I will frag you a piece of that later. If you want to frag that piece and we will trade. If you are in it to flip rocks and make some money. Leave that to the stores.