Its a useless part that cost around 1/5 of a ok datsun 510. I rather buy some nice wheels for that price or, a good running KA, a nice interior,AC,coilovers,etc.
It is clean and rare but pricey... If I wanted something rare. I would buy the JDM blue bird grill for 800$ or OBO from wagdatto that actually does make a noticeable difference on a dato 510's appearance.
http://community.ratsun.net/topic/22373-testing-waters-bluebird-grill/