You could get a TS1000 for about $200
Atari 400 $300
Atari 800 $500
Apple //e $1500
Kaypro II $1500 (drops to about $1200 in 1985)
Kaypro IV $2000
Tandy 1000 $1200, later drops to $1000.
TRS80 Pocket Computer PC1 $230. Cassette interface $49 + cassette deck. Printer $149 (prints on receipt tape). 1 line interface, 24 character wide dot matrix display,
"Sharp PC-1210 offered 896 bytes of memory and the BASIC programming language (in a simplified variant called S'-BASIC "S Prime BASIC," S being short for Sharp), using a 4-bit dual CPU system, for an MSRP of US$229." (Same device, different labels, as the PC1.) It's worth noting that all ram is pokable, including several operational flags...
This help with understanding the prices?
Go dig around
http://oldcomputers.net to get more pricepoints.