They should be fine. I used egg cartons at first too
There's one out towards Pitt For $150 right now but I can't yet. I gotta save everything we get this year for coop repairs and my brothers wedding in Oregon lol
I sell them locally on pennswoods, craigslist, and swaps though I am getting in good with the local feed store
Maybe later in the season they'd be interested.
@Dheltzel how are you advertising your welbars? I have a couple more weeks til I start collecting the eggs from mine but I want to try to get some preorders going. I'm just not sure how to word it lol