Have seen 'em both ways. I'm usually much more confident of the knowledge of the sales staff in the garage type though. I can Give one execption though. The shop is in the Des Moines Ia. area, is in a strip mall, Very new, clean and well ordered, and somehow still has a knowledgeable staff. Not only did they not give me the quizzical "Dog hearing a new noise" look when I asked for T-Rex parts,, they actually had someone there who flew a T-Rex. Wish i could remember the name of that place.