O_o

My sister paid about that much for an otherwise custom-made bridesmaid dress, that she didn't end up wearing.

Depends on what kind of dress it is. For something like an evening gown, yeah $150 is kind of low. But for a more casual dress that you could wear on a night out, $150 is a little high.

I dotn know much about dresses, I've just heard that some cost a lot more

i normally would too until i found myself agreeing to buy the dress my now sister in law wanted... if it were truely once a year i had to buy one no fucking way, but for big events for important people... you make an exception or two.

My wedding dress in a couple years. That's my exception :D

that is prone to be thousands instead of hundreds

It better be