Couple of tips:
1) Buyer should be willing to drive a bit. This is a great price on a very clean, lightweight set of premium wheels and tires. Shipping is absurd and not worth the hassle.
1-2 tanks of gas and a short road trip would be awesome for something like this.
2) Shipping cost on one wheel is easily $50-75/ea to 48 states without some kind of business/commercial account.
Only big businesses who obtain massive shipping discounts and aggressively low rates can handle doing so affordably.
This doesn't include the added weight and bulk of the tires, which will send that bill up considerably.
3) The odd/oversized size of the items sends shipping costs through the roof by virtue of how much space they take up on the truck in shipping.
This is all coming from someone with a background in shipping who still uses FedEx-G for a LOT of business transactions and private sell work. I talk to my FedEx peeps regularly about what issues they're experiencing, how stuff is charged, and what I can do to reduce my shipping/transit costs.
To the OP - beautiful setup! GLWS.
Sharing this to save you from a hundred ditzy PMs from people asking about shipping who have no clue the burdens and costs of doing so, especially on large/heavy items.