OVERVALUE

overvalue, overestimate

(verb) assign too high a value to; “You are overestimating the value of your old car”

Source: WordNet® 3.1

Etymology

Verb

overvalue (third-person singular simple present overvalues, present participle overvaluing, simple past and past participle overvalued)

To assign an excessive value to something.

Source: Wiktionary

O`ver*val"ue, v. t. [imp. & p. p. Overvalued; p. pr. & vb. n. Overvaluing.]

1. To value excessively; to rate at too high a price. "To overvalue human power." Holyday.

2. To exceed in value. [R.] H. Brooke.

Source: Webster’s Unabridged Dictionary 1913 Edition