Thank you all for your very helpful input. After driving around for about 3 hours - success - I was able to buy a 7 lb, bone-in, pork butt at BJ's in Danvers, MA.
First I tried BJ's in Medford. They had picnics, but no butt. At Danvers, they only had picincs in the case. However, I asked a woman who worked in the meat dept and she said she had bone-in butt in the back. She brought out a 2 butt cryopack whiched weighed about 14 lbs and the price was $1.39/lb. She said she could split the pack, but would have to raise the price to $1.69/lb for a single butt, which I purchased. At Costco, and Market Basket I found boneless butt, but none of the bone-in variety.
John