"Quality" in some cases means reliability and longevity. "Build quality" implies a bit of care beyond the bare essentials. For example, any number of companies produce "quality" pistols in that they function reliably and will last a long time; on the other hand, pistols like a Sig P210 or the 1911s made by Les Baer or Ed Brown are typically going to be smoother, more accurate, and have better triggers than something generic. In cars, a vehicle with higher "build quality" may ride better, seams may line up better, and it won't have as many squeaks and rattles as a cheaper car . . . but odds are, it won't get you to the corner any faster.
"Price point" means what can be offered at a given price to meet the needs of purchasers who WON'T pay more; for example, there are consumers who simply WILL NOT pay more than $500 for a handgun; at that price point, no manufacturer is going to offer the features or build quality of Baer, Brown, etc.
As for shrinking packages that RKL mentioned . . . that's just a sneaky way of concealing price increases. (Some years back, Consumer Reports mentioned this phenomenon in respect to paper towel rolls; IIRC, Bounty said it was to "prevent" price increases, but CR accurately opined that it was to hide them.)