All sold out at the original Franklin Barbecue trailer in Nov. 2010. (Photo ©Chris Wilkins/Texas BBQ Posse) Posse co-founder Chris Wilkins sent me a photo the other day from a trip we made to the original Franklin Barbecue in November of 2010. It shows the front of Aaron Franklin’s little trailer in Austin and his barbecue prices at the time. “Sweet memories,” Wilkins said in his email subject line. Indeed. Franklin then sold his terrific brisket for $13 a pound. Now it’s $20 a pound, a nearly 54 percent increase. Ribs were $11 a pound then; now $17, also a…