liudr:
The 328P is about $4 each. Then a nano clone costs only $3 -$3.50 so why designing anything?!
Futurlec (ships from HK) has been charging $2.20 ea for single DIP 328P's. Shipping is not free but for me so far, about $7. They sell the DIP 1284P for $7 and have a wide chip selection. I've spent about $40 a pop there.