Do you mean you didn't change out the bulbs to amber ones and so they are lighting up clear? Some really old cars came with clear marker lenses and so while clear marker lights (steady light) can be technically legal, clear turn signals (blinking lights) are not. If you haven't already, get amber (3157A/3157NA) bulbs ASAP. You should also use amber 194A/194NA marker bulbs in the corner light sockets, since a clear light would look like a broken lens at night.
All 50 states require amber front/side reflectors. It's possible to stick an amber reflector on in addition to the clear side markers and comply with the law, but chances are good that the clear reflector will look like a broken lens at night as well, giving a picky cop just the excuse they need to pull you over and check everything. The front signal/marker clear lenses are usually DOT/SAE approved and with amber bulbs, are fully street legal.
Like I said, it depends on the brand and/or quality. The cheapos don't appear to be worth more than $20 shipped. Consequently, any near-OEM quality lenses would only be worth more than that to someone who knew what they were and cared enough to pay more for it.