Just out of curiosity, Danny, why would you be doing a 6E shopping spree when all of the books are/will be likely available on Ebay and Amazon marketplace for cheap? They may not be in-print anymore, but copies won't suddenly disappear...if anything they'll be cheaper if Hero Games liquidates its stock.
1) Risk/reward. I'd rather ensure I get the ones I really want than risk not being able to catch it later.
2) Enlightened self-interest. I prefer to shop in my brick & mortar FLGSes than online for many reasons, including helping make sure I still have brick & mortar FLGSes to shop in. The rare things- of any kind- I buy online are things my locals would merely be serving as middlemen for (IOW, they would be getting what I ask for from Amazon, etc.).