I would say no, unless they have the magazines or goods you would buy anyway. In general the whole thing becomes a tange of social obligations, but if you just look at it as products for sale, its OK. I also sell GS cookies at work for my daughter, only because I just hang a sign on my door and people go ape$hit for them.

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1985 380SE Blue/Blue - 230,000 miles
2012 Subaru Forester 5-speed
2005 Toyota Sienna
2004 Chrysler Sebring convertible
1999 Toyota Tacoma