You got a lot of good advice above. When I have cooked for charity organizations, I have found that there is a limit for what folks will pay, that limit seems to be around $8 here in CA. A tri-tip or brisket sandwich seems to sell straight away for that price. Selling sausage, it seems like sales have been better at the $5 mark. Folks seem to view them as hot dogs.
I'm feeling bearish, and I'm packing a Wusthof Grand Brisket slicer from MABA
"perhaps...but then again...maybe not..."