New rubi's top out around $1200. Sahara 18's rarely sell quickly and end up not getting much.
Yours are used with a good amount of miles, And there is a lot on the market for sale. Better off on CL. You can try $500 but doubt you will see it.
Here's a good example. I paid almost $2000 for my 35's and 15" wheels.
A year later with only 10-15k I was happy to get $750