sight unseen
if you buy or choose something sight unseen, you do it without looking at the thing first

[TahlilGaran] Dictionary of Contemporary English ▲

sight unseen
without seeing or examining something first.
He purchased the Longfellow manuscript sight unseen from a collector in Houston.

[TahlilGaran] English Idioms Dictionary ▲

sight unseen
before seeing a thing or a person
My friend bought the car sight unseen and now he is having trouble with it.

[TahlilGaran] English Idioms Dictionary ▲

sight unseen
adv. phr. Before seeing it; before seeing her, him, or them.
Tom read an ad about a car and sent the money for it sight unseen.

[TahlilGaran] English Idioms Dictionary ▲