Interestingly, some of my best-performing seeds this year have been the very cheap packets I purchased at Rite Aid. The Rite Aid zucchinis far out-performed the Burpee packets that were eight times the price, and the marigolds and zinnias also exceeded my expectations.
I picked up some end-of-season foxglove seeds from a trip to Walgreen's last week, and I hope that my strategy of drugstore-as-nursery continues to pay horticultural dividends.