I've just had a nosey on Amazon and I see that BioGuard is being offered in packs of two for $69.99. TradecoZone are the sellers.
I have also searched on the four Natures Plus products that I know about and they are all being offered by at least one seller.
It pleases me to see these products being sold as widely as they are, especially through popular portal sites like Amazon.com. A bigger audience will equal bigger sales which of course equals bigger revenues for Blis. They may not be big sellers, but anything is better than nothing which is where things were at twelve months ago...