I bought about 10,000 bags and sold them for exactly what they cost me for a kit that would part out 2 normal machines, or whatever someone wanted. That way I could get great deals buying a hundred or a thousand of one size and sorting them for everyone who wanted 'em in FS/FT.
I have no problem doing it again and fronting the money, but the Mods told me to stop selling them because it was 'for resale' even though I was doing it for cost. IIRC I lost about $10 because one package went missing in the mail. No biggie.