I always go back and forth from Hy-Vee and Fareway. Depending on who has it on sale. I'll throw six on the smoker at once, and vac seal once I get them all pulled. Just throw a little rub and some maple syrup on them and let them go for 15-17 hours. I put a water pan in with and get great bark. When I get ready to vac seal, I add more rub to it.
I've even made buckboard bacon from shoulders. So for me it really isn't that big of a deal when choosing where to buy them. Yeah, I've had some that looked bad, but it hard to tell what the inside is going to be like just from looking at it from the outside. When I buy I will go to the meat counter and ask for the biggest shoulders they have.