Selecting the first occurrence of a duplicate

[snippsat]

I'm not sure if that's the correct or best way to go about it, but the results are:

Probably could fix it earlier when parse out the values to not get duplicates,like using CSS selector in BS select() and select_one() to get right tags.
range(len(sequence)) is looked as a bad way in most cases,
can maybe be justified here as use step parameter in range() here,that enumerate() dos not have.

An other way remove duplicate then loop.

prices = [
    "$139,501",
    "$139,501",
    "$137,349",
    "$137,349",
    "$132,955",
    "$132,955",
    "$129,000",
    "$129,000",
]

for item in dict.fromkeys(prices):
    print(item)

Output:
$139,501
$137,349
$132,955
$129,000

Just remove duplicates without care about order would be to use set().

>>> set(prices)
{'$132,955', '$139,501', '$129,000', '$137,349'}