Mercedes R129 SL500 HID headlights Factory 500SL - $1,200 (san carlos)

I have factory option SL500 HID headlights off a 1999 Merceds.
They were in great working condition when i pulled them off.
I replaced these with standard halogen headlights with the thought of buying another SL500.
I decided to part with these for now.
I assume since the halogen headlights were plug and play, these HID should be easy to upgrade any car.
Feel free to ask questions.
I took photos of the headlights before i took them off, They are a must have upgrade for modern top down motoring.
They are in great shape, minor pitting that is unnoticeable for a few feet away.
Finding a set can be hard to find, usually you'll find them parted out from unknown cars.
$1,200 firm, at the moment I'd just hang onto them if i can get below market value.