Yes, you are right about the quality feels a bit cheap on these. Dont know how the old ones feels.
A bit off topi: How much is a chrome smiley bumper for 1977 celica worth in the states?
It depends on which bumper and for what model, how straight/rust free/etc it is. Liftback rears are probably the most difficult to source, being on the fewest cars and not having any US equivalent. Coupe rears are the same as US market '71-'72 bumpers, and us market '73-'74s are the same besides overriders that are easily removed and some exposed rivets, so less people are bent on getting non-US spec ones when the US ones aren't that bad.
Early coupe fronts are likewise desired, but not as much as the later flat nosed coupe/liftback fronts. Early coupes are the same as US '71-'72s so they exist here, and though US '73-'74s have notches in the bottom, again, they're not that terrible compared to the diving board, so the market is smaller. The later flat nosed ones, it seems the ones with turn signals in the bumper and the ones that don't have them are pretty much chosen on a personal preference, but there's no US equivalent so they're more desirable as well.
No matter what bumper you have, you better have mounting brackets with it too, or there's going to be a chunk of value taken out. The rears don't always have separate brackets, but the fronts do, and they're specific to each style of bumper.
Many in the US have gotten really tired of overpaying for bumpers and there's reasonably high quality fiberglass replicas available these days too.
Otherwise, it's on a person-to-person basis what is paid. Shipping is a huge chunk of cost so people will debate that as well, and if it needs to be straightened or rechromed, that's pretty f***ing expensive in the US these days.
It scares the bejesus out of me that someone, somewhere ordered the Lusitania with front drum brakes.