We grew up with lead paint/lead soldiers.lead toys.We turned out ok with the odd exception of perhaps the odd pair of webbed feet and maybe the occasional third nipple.
If eBay outlaws the sale of lead chips,then they will also have to outlaw hundreds of different other things with lead in them.Not gonna happen.Collectors would revolt. Think about it:no old dishes,no old sinkers,soldiers,toys,no fishing lures, no lead bottomed(weighted)lamps...the list goes on.
Enjoy your chips...just don't ingest them,and all will be well with the universe.