If you want 10,000. Or they'll custom engrave one at a time for a rather large fee. Like $25 or more.
Apprently 4C's are getting scarce. I discovered one of mine was plagued by leakers so I figured "eh, just buy a new one". Yeah, right. The only one I saw was at eBay for $155!!
I got it fiixed though. Took a few days of trial and error. The usual WD40, vinegar, baking soda and 3n1 oil were no go. Mrs Fixer says "you tried Coca Cola?" "Why no I haven't". We had some left from Thankgiving and 5 minutes later gray stuff started rising up into the pond of it in the barrel and "woosh" it suddenly drained like a toilet flush. The battery came out like it hadn't even been stuck.
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And it works good as new again.
I replaced the switch and will rebuild the old one after cleaning the parts and pieces.