At Boeing.com open Commercial Airplanes then About Commercial Airplanes for the price list. Airbus does not publish list prices on the website. Here are some average figures in USD:
A319 50-55M
A320 65M - ave most going for 50M
A330 95-115M
A340 190M
A350 155M
A380 270-285M
For used models in year 2000 dollars:
1999 B734 34M
1988 B734 19M
1999 B735 27M
1990 B735 16M
1999 B737 34M
1999 A319 33M
1996 A319 29M
Depreciation on the 737/A32X group averages between .8 and 1.3M per year. The used aicraft market can be volatile - some years the prices actually went up due to demand. Good Luck!
Not requested, but interesting:
1994 A300B4 10M
1981 L-1011 4.3M
1987 B732ADV 5.4M