IMO putting running boards on ebay is a waste. I doubt you can get more than maybe $40 for them. Shipping's going to double that easily. Then you have to figure out how long it's going to take to get them boxed up and down to the shipper. By the time it's all said and done, you've spent a few hours of your time, money for boxes, money for gas to get them to the shipping location and money for eBay fees and at the end you might be lucky to net $30 - $40?
Ultimately it depends on how much your free time is worth. Mine is worth a lot. More than $40 for a couple hours.
If someone was dumb enough to pay $200 + all shipping costs I might consider it. But nobody in their right mind would pay that for running boards.
I would sell them locally on CL.