It looks as though we're using the word reasonable
in two different ways, both of which can apply to monetary value. As Merriam-Webster
specifies (and I've only included the bit which pertains to us):
adjective \ˈrēz-nə-bəl, ˈrē-zən-ə-bəl\
Definition of REASONABLE. . . .
c : moderate, fair <a reasonable chance> <a reasonable price>
d : inexpensive
According to d.
, my prosaic interpretation of reasonable
is correct (i.e.
, literally less expensive).
But according to c.
, the more general sense of pricing -- moderate, fair -- is also correct.
What I like about d.
is that it isn't open to interpretation: A thing is either more expensive than another or it isn't.
But when it comes to pricing vs. value, the word reasonable
itself turns out to be open to reasonable interpretation.