Not sure how many you're auctioning or what the materials costs are but that is very generous.
If I was in that position I think I would donate to two sources, I typically don't like all my eggs in one basket.
Too be honest the time and material along with cost means nothing to mean. Right now our fellow Americans need us. The Lord has blessed me and I wanna give back to the ones that really need. I'm gonna try and auction off as many as I can.
Hope I wasn't coming off smart as I wasn't meaning too.
