the value is about 3000 for fair condition.. 5000 for good condition.. and more for mint condition.. you can get the value from NADA.com under classic cars
i had a similar issue and it was because i had a huge vaccum leak. those vaccum hoses are very old and it becomes common for them to have wear and tear
ZXT swap is probably the best choice and I have been able to find some whole donor cars for very cheap ($500) on craigslist but it's located far from where I am so it doesnt do me any good. Also, instead of doing the swap there's also the option of just buying a good shape ZXT but then i'd have to sell my NA 280zx first. I'm still trying to weigh out some options.
Thanks for the help Captainnapalm! I think the headlights are dim because of a bad ground, I will check on it tomorrow!
Also, my headlight switch does have cruise control so i will check on one of the same year with cruise control. Thanks!
So yeah.. the headlight switch went bad on my 1982 datsun 280zx and i've been looking for one to replace it with. so far i found three from the years 1979-1983 on ebay. all of them said that it'd work for my car or any from 1979-1983. that's not the case! i bought one from another 1982 280zx and it was very different from mine. i also have a 1979 as a part car and that headlight switch was different from mine as well. then i found another one from ebay that's different. how many different headlight switch assembly could there be??!!!
also, my headlight is super dim and very hard to see at night. is that normal for a 280zx? my options for that are: getting HIDs or waiting to find a replacement for my headlight switch and drive around with high beams hahaha