Appreciate it Gerry,
I'll work on finding the offset. And getting them home.
Forgot to mention wheels are off a e430 w210
The phrase "Off of a E430 W210" does not mean they are really W210 wheels. All that means is that the previous owner had a set of monoblock wheels mounted on a W210.
I cringe every time I see those words in an ad, "Off of a yada yada yada", it means nothing at all about proper fitment. All it does is give false belief that the wheels are really e430 w210 wheels, never except that statement, always doubt and ask for the wheels sizes. I won't even go look at wheels without knowing their sizes before hand. And when buying from a distance, pictures of the sizes cast into the back sides of the wheels is mandatory, I was burned once, never again to believe words without backup.
The only time that may be true is on a one owner car, and the owner verifies that the wheels came on the car when it was purchased new. Other than that, so many people swap wheels around, and many times incorrectly, you just can't trust a claim of fitment, only actual wheel sizes matter.
Hopefully those monoblock wheels you bought are really E class wheels, but they make monoblock wheels for S class cars you know, and S Class and E class wheels are not compatible in general.
The fact that your asking about value, then finding out the ET, then bringing them home, is out of sequence.
Your sequence should be;
1- What size wheels fit my car - and shop for those sizes only
2 - What size are these wheels for sale, and do they match my needs
(this is where you would ask the question in a forum, example; "the wheel sizes are 8x18et31, will they fit my E500", or whatever car you have)
3 - Then Buy only after you have verified they will fit, and the price is ok.
I've seen so many posters with wheel fitment problems, whose first post is after they buy, again backwards. Rather than ask after you buy, if you don't understand wheel fitment, ask before you buy, and don't make the purchase if they are not compatible.
When I purchase wheels I always ask or look for the 3 wheel sizes cast into the back of the wheels.
Knowing the exact wheels sizes or part numbers is the only way to verify your buying something that will fit correctly.
Good luck, hope these fit for you, and better yet, hope you didn't buy wheels only to find out they don't fit