AppleII

Apple I

introduced: 1976.7
terminated: 1977.9
CPU: MOS Technology 6502
PROM: 256byte
RAM: 4KB
PRICE: $666.66
Total About 200 units

Apple II

introduced: 1977.7
terminated: 1980
CPU: MOS Technology 6502 1 MHz
PROM: 12 KB
RAM: 4 k (maximum 64 KB)
PRICE: $1298
Total  

Apple II+

introduced: 1979.6
terminated: 1980
CPU: MOS Technology 6502 1 MHz
PROM: 12 KB
RAM: 4 k (maximum 64 KB)
PRICE: $1195
Total  

Apple IIe

introduced: 1983.1.19 1985.3Enhanced 1987.3 Extened
terminated: 1993.11
CPU: MOS Technology 6502 1 MHz
PROM: 12 KB
RAM: 4 KB (maximum 64 KB)
PRICE: $1395
Total About 65,000 units

Apple ///

introduced: 1980.5.19,1983.12
Apple///+ $2995
terminated: 1985.9
CPU: Synertek 6502A 2 MHz
PROM: 12 KB
RAM: 4 k (maximum 64 KB)
PRICE: $7800
Total  

Apple //c

introduced: 1984.4.24
terminated: 1988.8
CPU: MOS Technology 65C02 1 MHz
PROM: 16 KB
RAM: 128KB
PRICE: $1295
Total  

Apple//c

Apple //c+

introduced: 1988.9
terminated: 1990.11
CPU: MOS Technology 65C02 4 MHz
PROM: 32 KB 
RAM: 128KB
PRICE: $675 
Total  

Apple IIGS

introduced: 1986.9
terminated: 1992.12
CPU: 65C816 1 or 2.8 MHz
PROM: 256 KB
RAM: 256 KB or 1 MB  
PRICE: $999
Total  

Reference:
http://oldcomputers.net/