First off, I'd like to say that this thread makes me want to cry since I live in a Trader Joe-less city.
My former favourites were:
Frozen plain cheese pizza (imported from Italy!)
Chicken chorizo sausages
all of those affordable gourmet cheeses
The raspberry creme brulee (comes with reusable ramkins)
dried chile mango
spinach, bluecheese, cranberry and pecan salad in a bag
frozen balsamic roasted vegetables
massaman curry rice bowl
cheap almond butter
tempting trail mix
Trader Joe's High Fiber O's cereal
frozen fish (tuna steaks)
OK, I'll stop.